Headers & Horsepower

[crouse]

I'm thinking about either Kooks or Stainless Works headers. I have the stock exhaust manifolds but I have 2-1/2" exhaust system with Magnflow cats. Does anyone have any thoughts as to how much horsepower gain I can expect? Headers, plus installation & dyno tune could cost as much as $1600 - $1800. Wondering if it's worth the money.

[SC Cheesehead]

I'm thinking about either Kooks or Stainless Works headers. I have the stock exhaust manifolds but I have 2-1/2" exhaust system with Magnflow cats. Does anyone have any thoughts as to how much horsepower gain I can expect? Headers, plus installation & dyno tune could cost as much as $1600 - $1800. Wondering if it's worth the money.

On a NA car, prolly pick up around 20 -25 hp, that works out to around $75 - $80 per pony.

Go SC, spend $4,000 - $5,000 for an Eaton swap, pick up around 100 hp...

If you're looking for most bang for the buck, save up a bit more and go the SC route.

[jstevens]

I agree, headers make the most sense with s/c'r. or more bang for the buck so to speak.

[sailsmen]

The best price is putting together a group buy, this has been done with both SW and KOOKS.

[StainlessWorks]

Stainless Works (http://www.stainlessworks.net) is good with a group buy on headers/exhaust for the Marauder.

If your interested post up and lets see what we get going.

[MOTOWN]

I definetly need a set! im in!!!

[breeze]

I definetly need a set! im in!!!

I'm down!!!

[nh muscle]

Count me in

[StainlessWorks]

Thanks for the interest so far, please PM me and let me know what your interested in?

If we can get 2 more interested FREE t-shirts for all!

[tbone]

I got the notice that my SW shipped today. :)

[beantown mm]

Hey Paul, thinking of jumping on this too, can you tell me which cats come with the MAUCAT setup, are they the Metal Matrix ones?




Stainless Works (http://www.stainlessworks.net) is good with a group buy on headers/exhaust for the Marauder.

If your interested post up and lets see what we get going.

[StainlessWorks]

Stainless Works (http://www.stainlessworks.net) uses a 200 cell hi flow metal matrix cats

Link to Converters (http://www.stainlessworks.net/products/catalytic-converters/catalytic-converter-metal-matrix-hi-flow.html)

http://www.stainlessworks.net/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c23097 2d/R/T/RTCMM.JPG

[Mebot]

I would love to jump in on the group buy but gotta save up $$ first. Please keep me on the long list! Headers and exhaust is definitely on my list to do!

[StainlessWorks]

I would love to jump in on the group buy but gotta save up $$ first. Please keep me on the long list! Headers and exhaust is definitely on my list to do!

Not sure if this will help, but we will do a 50% prepay at the time of order and final payment is expected at time of shipment, which will be 3+ weeks after placing the order.

[beantown mm]

Thanks Paul, the reason I asked was that on the System Parts List on your site, it says the Ceramic ones come with the kit, thanks for clarifying.

[Mebot]

Not sure if this will help, but we will do a 50% prepay at the time of order and final payment is expected at time of shipment, which will be 3+ weeks after placing the order.

Thats definitely good to know! Thanks!

Sent from my Samsung Droid Charge

[DOOM]

You should see a gain of 25-30 RWHP on a N/A car.

I picked up 50 RWHP when I bolted mine on!

My car was making 423 RWHP on the stock manifolds. Installed the KOOKS and power jumped to 475 RWHP!!!

[loud2004marquis]

Not sure if it would count, but my order for the full exhast is in and should be ready the 14th.

[Marauder Rick]

Are you flippn kiddn me? Yall decide to attempt a group buy 2 weeks after i get my SW setup.:mad2: I want a T-Shirt too!! :bigcry:

[breeze]

So for a group buy we just get free t-shirts no discount!?

[tbone]

Thanks for the interest so far, please PM me and let me know what your interested in?

If we can get 2 more interested FREE t-shirts for all!

How about sending me one since I've been bragging about getting a set on here a LOT!

[Odinson]

What kinda discount are we talking here? With cats? Weighing my the risk to my life from my spouse vs saving a few on something I was doing anyway.

Then a dyno tune. Eeeeeek.

[1stMerc]

I'm in.. Do these have the extension/fitting for the Egr tube?

[BCMARAUDING]

I'm in for a group buy of SW headers!

[Dobs]

Count me in (im located in Canada, saying just in case this can cause problem)

Thanks,

[justbob]

I may be down for a complete system plus cats if the price is right.

Sent from my Ally while ruling the world from my toilet.

[Local Boy]

Love my SW headers...!

A shirt (2X) would be EXCELLENT!

Aloha

[PHHHHTT]

I am also interested. As with Odison, would have to know what the final figure will be before I could commit.

[BeanSS]

How much of a discount you talking?

[Mike M]

I'm in.. Do these have the extension/fitting for the Egr tube?

I need this question answered as well, also how much $$$ will it cost.

[yjmud]

the egr tube screws on with no extension

[Marauder Rick]

I need this question answered as well, also how much $$$ will it cost.


I'm in.. Do these have the extension/fitting for the Egr tube?

Unless you get the off road set, they do have an attached egr spout.

[StainlessWorks]

In the past Stainless Works has always done a Christmas in July sale and offered a 10% discount from the retail price, since we aren't doing that we are willing to do a group buy to MM.NET members at 15% off retail, but the only requirement is that we need five participating members in order to make it happen.

So, if we get five members, pricing will be 15% off retail. Let's get it on!!

Thanks-
Paul@stainlessworks.net

[MOTOWN]

In the past Stainless Works has always done a Christmas in July sale and offered a 10% discount from the retail price, since we aren't doing that we are willing to do a group buy to MM.NET members at 15% off retail, but the only requirement is that we need five participating members in order to make it happen.

So, if we get five members, pricing will be 15% off retail. Let's get it on!!

Thanks-
Paul@stainlessworks.net

Im very interested what will the exact price be:confused: not sure what the retail price is?

[babbage]

On a NA car, prolly pick up around 20 -25 hp, that works out to around $75 - $80 per pony.

You are always saying this, but $1500/25 = $60 per hp, but you get better mileage too.



Go SC, spend $4,000 - $5,000 for an Eaton swap, pick up around 100 hp...
Lot harder to install, you paid at least $1000 for your Eaton install..
Mileage will be worse.

Dynotune is a must have with an Eaton - figure at least $600 for a good tune.

$6600/100 = $66 per hp.:eek: This HP costs more than SW headers and we didn't even add in the extra gasoline.



If you're looking for most bang for the buck, get SW headers.Fixed it for ya. ;)

[breeze]

Im very interested what will the exact price be:confused: not sure what the retail price is?

1390 with cats. 1390 x .15 = 208.50 subtract 208.50 from 1390 get total then add shipping.
Looking at 1100-1200 for em.

[Siege]

In the past Stainless Works has always done a Christmas in July sale and offered a 10% discount from the retail price, since we aren't doing that we are willing to do a group buy to MM.NET members at 15% off retail, but the only requirement is that we need five participating members in order to make it happen.

So, if we get five members, pricing will be 15% off retail. Let's get it on!!

Thanks-
Paul@stainlessworks.net

The best price I've been able to find from a vendor for your MAUCAT combo (headers, cats, factory connect pipes) was $1189 shipped. That works out to be almost a 19% discount from retail (1390+24.68 shipping).

So.... how many people would we need in the group buy for a 20% discount? :devil:

[StainlessWorks]

Ok here is some pricing for the one time only this year Group Buy...

Headers Only

MAUCAT
$1390 Retail
$1181 Group Buy Price

MAUHDROR
$1190 Retail
$1011 Group Buy Price

Full System Including Headers & Exhaust

MAUHDR & MAUEXCAT
$2180 Retail
$1853 Group Buy Price

MAUHDR & MAUEX
$1980 Retail
$1683 Group Buy

[crouse]

Wow! Look what I started. All I wanted to know was horsepower gain. :)

[ctrlraven]

What about MAUHDR/MAU-PRODUCTS (headers only)?

[kariamack]

Can you buy the full exhaust system without the headers mufflers and exhaust tips???

[SC Cheesehead]

You are always saying this, but $1500/25 = $60 per hp, but you get better mileage too.

Lot harder to install, you paid at least $1000 for your Eaton install..
Mileage will be worse.

Dynotune is a must have with an Eaton - figure at least $600 for a good tune.

$6600/100 = $66 per hp.:eek: This HP costs more than SW headers and we didn't even add in the extra gasoline.

Fixed it for ya. ;)

Ummm, I did? :confused:

The initial outlay for my Eaton swap including parts, installation AND dyno tune was just under $4,000. The car made 428 rwhp on a conservative tune.

428 SC - (est.)260 NA = 168 hp improvement; you wanna run those $/HP numbers again? ;)

Average highway mpg NA 22.5

Average highway mpg SC 20.5 (Hard to do an objective comparison due to right foot issues.):coolman:

Think I'll stand by my statement... :D

[babbage]

Ummm, I did? :confused:

The initial outlay for my Eaton swap including parts, installation AND dyno tune was just under $4,000. The car made 428 rwhp on a conservative tune.

428 SC - (est.)260 NA = 168 hp improvement; you wanna run those $/HP numbers again? ;)

Average highway mpg NA 22.5

Average highway mpg SC 20.5 (Hard to do an objective comparison due to right foot issues.):coolman:

Think I'll stand by my statement... :D

I'm sure it's not real world, e.g. How many other Eaton swaps were under $4000 that included an install (labor) AND dyno tune?

Not to mention that your labor was 5 states away, but I'm sure that your less than $4k figure also included meals, travel, airfare and transport too right? ;) If you paid Dave less than a grand for labor you took advantage, IMHO.


Anyhoo, so If you have an Eaton/Trilogy and get the headers for $1200 that's 50HP gain.

$1200/50 = $24 per hp - Same cost/power as your Eaton swap with "lucky duck" pricing. :D

[StainlessWorks]

Can you buy the full exhaust system without the headers mufflers and exhaust tips???

Sorry, but we don't get into selling pieces and parts to systems.

[StainlessWorks]

What about MAUHDR/MAU-PRODUCTS (headers only)?

Header only retails for $890, Group Buy Price is $756.

[Odinson]

Put me down for 1!
MAUCAT
$1181 Group Buy Price

Can I also get the thermal coating on that for the group buy discount? Already get enough heat soak in the summer! BTW what brand and color is the coating?

[ctrlraven]

Header only retails for $890, Group Buy Price is $756.
Hmmm.... sooo tempting.


Can I also get the thermal coating on that for the group buy discount? Already get enough heat soak in the summer! BTW what brand and color is the coating?
Good call, forgot to ask about this as well.

[MOTOWN]

Header only retails for $890, Group Buy Price is $756.

At that price count me in!!!!!!:cool:

[breeze]

At that price count me in!!!!!!:cool:

Add another

[BeanSS]

For a set of just headers I'm in!

[Mebot]

Dammit why now??? Want this but need someone to call my wife & explain that the money I was saving up for our anniversary cruise in october is going to headers & exhaust lol :p

Seriously tho this is a great deal! Hope the guys that get in on it will make me feel jealous later! I know there will be another sale in the future

Sent from my Samsung Droid Charge

[Mike M]

Headers only I am very tempted. What would I need to attach your headers to my stock exhaust?

[babbage]

Headers only I am very tempted. What would I need to attach your headers to my stock exhaust?

Get the MAUCAT setup for $1200 and it will come with cats and BOLT right on. Headers only and youll have to weld, or drive it somewhere, which is a PIA.

[1stMerc]

Put me down for 1!
MAUCAT
$1181 Group Buy Price



Ditto, one more for the MAUCAT with egr tube and O2 bungs

[Siege]

Ok here is some pricing for the one time only this year Group Buy...

Headers Only

MAUCAT
$1390 Retail
$1181 Group Buy Price

MAUHDROR
$1190 Retail
$1011 Group Buy Price

Full System Including Headers & Exhaust

MAUHDR & MAUEXCAT
$2180 Retail
$1853 Group Buy Price

MAUHDR & MAUEX
$1980 Retail
$1683 Group Buy

Do these prices include shipping?

[Odinson]

Thinking about it. Definitely want the ceramic coating. Please post the price for MAUCAT with the coating.

Thanks!

[boatmangc]

Subscribing,
The math for the swap from shorties to LTH isn't that optimistic, from what I have learned I could see maybe 24-25 HP gain. :mad:

[robertmee]

I participated in the buy last summer, and finally installed them about 3 months ago. Great upgrade for my Trilogy. Put down 463 RWHP. I didn't get no T-Shirt tho!!! :(

[yjmud]

no t-shirt as well

[Mike M]

My biggest concern is noise. Right now with stock manifolds and rear cats gone and straight through tips the noise is absolutely perfect. If I accelerate mildly to moderately there is the correct amount of sound for a luxury performance car. If I get up to say 65 mph and settle down into a cruise there is literally no exhaust noise., which is perfect for me.
Im afraid with the headers even with my stock pipes and muffler it will drone at cruise or just be heard at cruise.

Anyone with stock mufflers and headers that could comment?

[robertmee]

I went from stock manifolds and quiet mufflers to SW headers and Borla mufflers, rear cat delete and 2 1/2 with X-Pipe and don't notice any appreciable drone. With the windows up, the car is plenty quiet inside. When I jump on it, I hear the supercharger whine more so than the exhaust. I believe the factory did a good job in sound proofing the exhaust area....YMMV

[justbob]

The best price I've been able to find from a vendor for your MAUCAT combo (headers, cats, factory connect pipes) was $1189 shipped. That works out to be almost a 19% discount from retail (1390+24.68 shipping).

So.... how many people would we need in the group buy for a 20% discount? :devil:

What he said ^

15% off retail? Who pays retail to begin with? Not to mention this is also free shipped. Are these free shipped?

Sent from my Ally while ruling the world from my toilet.

[yjmud]

My biggest concern is noise. Right now with stock manifolds and rear cats gone and straight through tips the noise is absolutely perfect. If I accelerate mildly to moderately there is the correct amount of sound for a luxury performance car. If I get up to say 65 mph and settle down into a cruise there is literally no exhaust noise., which is perfect for me.
Im afraid with the headers even with my stock pipes and muffler it will drone at cruise or just be heard at cruise.

Anyone with stock mufflers and headers that could comment?

cruising on the highway at speed it is not bad until you un-chain the dogs of war

[StainlessWorks]

Thanks for the PM's, please if your serious about this, please send me a PM with your contact info so I can send you an official price quote. Keep in mind we need five orders minimum to make this happen. Once it goes into effect, we will require a 50% down payment.

Pricing listed does not include shipping, estimate about $65 (+/-) per part number. Thermal coat is Jet Hot Polished Extreme Sterling Silver, $450 includes the shipping.

MAUCAT is the best way to go as it will hit the factory connection point. If you buy just the header only you will need to cut and modify to fit the existing factory lead pipes.

[Odinson]

Awesome. I'm in for a MAUCAT with Thermal coat.

OK Folks who said OK. Lets PM Paul and get those T-shirts!

50% down is no problem.

[StainlessWorks]

Ok guys need some more PM's and.......SW may be looking for a car locally.......

[Taemian]

Hey, just an update from the guy who set up the whole 17 order Group Buy for SW a few years back. (2009)

My SW hi flow cats went out last year in big chunks through my exhaust on one side, nearly plugged the other stock muffler completely. I couldn't find my receipt, but since the evidence was there in a 23 page GB thread, they said they'd look into it. Never did find it even though I gave them the invoice numbers of many people in the group buy who bought orders just before and just after mine were processed.

Anyhow, they said send them back and we'll decide if we can warranty them, but in the meantime pay for new ones and we'll send them out until we decide whether or not to warranty your originals. Then expect a refund IF we validate your claim.

As it happens, the regional emission check here (AirCare) has reently been discontinued so I have no need or desire to put in a sub-standard part again.

I had to have them fully hollowed out at my expense and will also require new mufflers. This doubles what I paid for them. Thanks so much. They lasted a grand total of about 20K miles, and just yesterday I get a call from 2DMAX saying his SW high flow cats just blew chunks over the weekend on a trip far from home.

I think it's safe to say that there are about half a dozen people in our GB that had this issue if you seach the threads since 2009. I can think of 4 for sure, and I'm only on this board about once every 4 months lately.

STAY AWAY from the SW HIGH FLOW CATS. That's not merely an opinionated statement, but based on a long term failure rate of at LEAST 25% from the group buy I set up back in 2009. I have zero interest in debating the subject, I'm merely reporting the data that exists.

UPDATE: Just checked something. I should mention that all of these confirmed failures happened on s/c cars. No idea if n/a cars are similarly affected. But really, these items are not cost effective power gains on anything but s/c cars, not sure if any orders of the high flow cats were for n/a cars.

[justbob]

I'm glad you spoke up as myself have seen at least one other thread showing cracks on the outside.

Sent from my Ally while ruling the world from my toilet.

[1stMerc]

Thanks to Doomie. I can tell already how mine will sound.

[CWright]

Thanks to Doomie. I can tell already how mine will sound.


You will love it! :beer: The only reason I didn't go with exactly what DOOM has is I piss my neigbors off bad enough with Magnaflows. :lol:

[robertmee]

I went with the Magnaflow High Flows with the SW long tubes....Any notable problems with Magnaflow cats?

[CWright]

I went with the Magnaflow High Flows with the SW long tubes....Any notable problems with Magnaflow cats?


I went with Kooks LT Headers and their high flow cats and have been very pleased. I'm running the Maganflow 14" oval mufflers. I really like the sound.

[CWright]

Headers are a great stepping stone toward SuperCharging your car if you ever decide to. :burnout::burnout:

[1stMerc]

You will love it! :beer: The only reason I didn't go with exactly what DOOM has is I piss my neigbors off bad enough with Magnaflows. :lol:

Ya gots to stop trying to sneak in/out at three in the morning. Pisses them off everytime. :lol::beer:

[CWright]

Ya gots to stop trying to sneak in/out at three in the morning. Pisses them off everytime. :lol::beer:


:coolman: ;)

[babbage]

Hey, just an update from the guy who set up the whole 17 order Group Buy for SW a few years back. (2009)

My SW hi flow cats went out last year in big chunks through my exhaust on one side, nearly plugged the other stock muffler completely. I couldn't find my receipt, but since the evidence was there in a 23 page GB thread, they said they'd look into it. Never did find it even though I gave them the invoice numbers of many people in the group buy who bought orders just before and just after mine were processed.

Anyhow, they said send them back and we'll decide if we can warranty them, but in the meantime pay for new ones and we'll send them out until we decide whether or not to warranty your originals. Then expect a refund IF we validate your claim.

As it happens, the regional emission check here (AirCare) has reently been discontinued so I have no need or desire to put in a sub-standard part again.

I had to have them fully hollowed out at my expense and will also require new mufflers. This doubles what I paid for them. Thanks so much. They lasted a grand total of about 20K miles, and just yesterday I get a call from 2DMAX saying his SW high flow cats just blew chunks over the weekend on a trip far from home.

I think it's safe to say that there are about half a dozen people in our GB that had this issue if you seach the threads since 2009. I can think of 4 for sure, and I'm only on this board about once every 4 months lately.

STAY AWAY from the SW HIGH FLOW CATS. That's not merely an opinionated statement, but based on a long term failure rate of at LEAST 25% from the group buy I set up back in 2009. I have zero interest in debating the subject, I'm merely reporting the data that exists.

UPDATE: Just checked something. I should mention that all of these confirmed failures happened on s/c cars. No idea if n/a cars are similarly affected. But really, these items are not cost effective power gains on anything but s/c cars, not sure if any orders of the high flow cats were for n/a cars.

They switched the cats to better ones -- 200 cell metal matrix, you got the old style 400 ceramic ones.

[sailsmen]

These were part of a package purchased from KOOKS. The CATS cracked in half.;
04-23-2011, 09:43 AM
sailsmen
Contributing Member


Join Date: Feb 2003
Location: Earth
Posts: 5,724
Trader: (1)
Post Feedback

I cannot rec Magnaflow Products. They admittedly made defective Cats. They refused to replace mine becasue they were out of warranty.
A defective product is defective regardless of any warranty. You etiher stand behind your product or you don't.

In this case Magnaflow did not stand behind their product.

http://www.mercurymarauder.net/gallery/data/500/medium/DSCN1260.JPG

[Odinson]

"They switched the cats to better ones -- 200 cell metal matrix, you got the old style 400 ceramic ones."

OK looks like I'm back in for a Maucat with ceramic coating. Thanks for the explanation in the other thread Paul.

Thanks for warnings folks.

[Dobs]

Does the complete exhaust better than the original (excluding the headers)?

[StainlessWorks]

Does the complete exhaust better than the original (excluding the headers)?

http://www.stainlessworks.net/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c23097 2d/m/a/mauex_exhaust.jpg

The Stainless Works (http://www.stainlessworks.net) exhaust uses smooth CNC mandrel bends instead of the pressure bends that come on a factory exhaust. Also this system features better flowing mufflers and of course its all 304L stainless which will give a lifetime of durability. Oh, almost forgot about the X-Pipe to balance the exhaust pulses for better velocity.

The 3.5" polished stainless steel tips look powerful too!!

[StainlessWorks]

To all those interested in the group buy, thanks for the PM's, we are getting close to our minimum quantity.

Even though Stainless Works (http://www.stainlessworks.net) initiated the group buy offer, all sales will process through Chris at ADTR.net (http://www.adtr.net)
We work very close with ADTR as they have coordinated a number of group buys with us and do a good job of making it all happen.

[justbob]

To all those interested in the group buy, thanks for the PM's, we are getting close to our minimum quantity.

Even though Stainless Works (http://www.stainlessworks.net) initiated the group buy offer, all sales will process through Chris at ADTR.net (http://www.adtr.net)
We work very close with ADTR as they have coordinated a number of group buys with us and do a good job of making it all happen.

Curious why? I have bought directly through venders like Metco for one. Less middle men, more savings = more buyers. Make it 25% off and your sales would probably increase 10 fold and you still make out good. I would send full payment today, plus you can keep your shirt.

Besides, ADTR isn't a vender here.

Sent from my Ally while ruling the world from my toilet.

[StainlessWorks]

Curious why? I have bought directly through venders like Metco for one. Less middle men, more savings = more buyers. Make it 25% off and your sales would probably increase 10 fold and you still make out good. I would send full payment today, plus you can keep your shirt.

Besides, ADTR isn't a vender here.

Sent from my Ally while ruling the world from my toilet.

Great location to rule the world, its hard to find a more suitable location! haha

As a manufacturer we rely on the support of our dealers to promote, install and sell our products. We can't imagine what would happen if we eliminated our network of dealers. For this and many reasons we will continue to support those who take care of us, it's about relationships.

[babbage]

I've gotten quite a few things from Chris at ADTR, he is first class all the way. Guys I paid $1500 for mine (maucat) this is a steal for these headers...

[Dobs]

When ceramic coating is added, is stainless really desirable? (headers only)

[StainlessWorks]

When ceramic coating is added, is stainless really desirable? (headers only)

Typically the alternative to stainless steel is a mild steel header. When adding a thermal coating to a mild steel header, the mild steel will still rust from the inside out, its only a matter of time. The thermal coating is attempting to delay this process wheras we do it purely for its performance benefits.

Stainless is desirable due to the fact that it will not rust. Stainless Works (http://www.stainlessworks.net) exclusively uses 304L stainless steel, which is premium material for exhaust use and is a superior quality over 409 stainless. We offer the option of Jet Hot coating for better exhaust scavenging and also to keep heat from the exhaust away from critical electronic components and the intake system. Lower temps equal more horsepower!!

[Dobs]

Thanks a lot for the good explanation.

For a complete system is the sound will be much more louder then stock?

[StainlessWorks]

Stock exhaust is fairly quiet, so upgrading to any performance exhaust there will be an increase in sound. If the desire is to increase HP/TQ and don't want it too loud, best practice is to use headers that meet the factory connection point and keep the stock exhaust.

Use our Stainless Works Part No. MAUCAT (http://www.stainlessworks.net/products/headers/mercury-marauder-2003-2004-headers.html)

http://www.stainlessworks.net/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c23097 2d/M/A/MAUCAT_headers.jpg

[StainlessWorks]

Thanks for all the PM's on the group buy, we are getting closer every day to obtaining the minimum order to make it all happen, thanks! If you have have sent us your contact info you can expect to be contacted by ADTR.net over the next few days.

At this point we are going to keep this open until the end of July just to give others an opportunity to get in on this deal.

[Dobs]

At this point we are going to keep this open until the end of July just to give others an opportunity to get in on this deal.

Thanks, im trying to fix myself between complete or headers only. I just cant decide. My brain fart *probably louder then a complete system.

[StainlessWorks]

Factory connection point will equal an easier install, less modification and less headache.

[1stMerc]

Thanks for the update.

[92BlackGT]

hmmmm, should I???

[StainlessWorks]

hmmmm, should I???

Great question, we get this all the time! Only purchase these if your in the market for increased throttle response, more torque and extra horsepower. Also, if your expecting these to rust in a few years, you may want to look someplace else as these are made from 304L stainless steel.

HA-HA, sorry it's Monday morning. Yes, get in on the group buy!

[Odinson]

I've got another question for you. Planning on installing wideband air fuel after the headers. That of course means cutting and welding bungs. Can I do that post ceramic? If not can I have them delivered with bungs pre welded in?

[Dobs]

I've got another question for you. Planning on installing wideband air fuel after the headers. That of course means cutting and welding bungs. Can I do that post ceramic? If not can I have them delivered with bungs pre welded in?
I was about to ask the same question

[babbage]

I've got another question for you. Planning on installing wideband air fuel after the headers. That of course means cutting and welding bungs. Can I do that post ceramic? If not can I have them delivered with bungs pre welded in?

Maucat has 4 bungs total, 2 before cats and 2 after cats. You could put the wide after the cats.

[Mike M]

After the cats? No way!

[StainlessWorks]

Installing the wide-band 02 is a great idea. If you don't want to use the rear 02's, making a hole in new location is no problem. This can be done before or after the coating, it will just look much nicer if done before the coating. Stainless Works (http://www.stainlessworks.net) can sell you a 02 bung (18mm x 1.5) for $9.99

[Odinson]

Installing the wide-band 02 is a great idea. If you don't want to use the rear 02's, making a hole in new location is no problem. This can be done before or after the coating, it will just look much nicer if done before the coating. Stainless Works (http://www.stainlessworks.net) can sell you a 02 bung (18mm x 1.5) for $9.99

Sounds good. I'll take two bungs, one on each side, installed next to the front factory ones. Not sure about the exact placement. They will obviously need about 2 inches of clearance from engine, firewall, etc, for most wideband sensors. Not sure if you have a standard placement.

:beer:

[StainlessWorks]

Sounds good. I'll take two bungs, one on each side, installed next to the front factory ones. Not sure about the exact placement. They will obviously need about 2 inches of clearance from engine, firewall, etc, for most wideband sensors. Not sure if you have a standard placement.

:beer:

Our apologies for not being exactly clear on this, we can install this once placement is determined by the customer, its very difficult for SW to choose a location as there can be many variables to exact placement for easy removal and install etc... and I'm sure each aftermarket kit may have different requirements. Clearance from the firewall, frame and engine are additional variables that make it difficult for us to install these before they get to the customer.

[Mike M]

Our apologies for not being exactly clear on this, we can install this once placement is determined by the customer, its very difficult for SW to choose a location as there can be many variables to exact placement for easy removal and install etc... and I'm sure each aftermarket kit may have different requirements. Clearance from the firewall, frame and engine are additional variables that make it difficult for us to install these before they get to the customer.


So you "can" or "can not" install the bungs?

[Odinson]

Our apologies for not being exactly clear on this, we can install this once placement is determined by the customer, its very difficult for SW to choose a location as there can be many variables to exact placement for easy removal and install etc... and I'm sure each aftermarket kit may have different requirements. Clearance from the firewall, frame and engine are additional variables that make it difficult for us to install these before they get to the customer.

OK makes sense. Don't blame you.

Hey MM.net folks what do you think?
Could someone with SW headers please look at the picture below?
What is the best placement of a bung? What number? In between 2 numbers?
Will the mirror image on the drivers side work?

http://www.warcloud.net/%7Eodinson/MAUCAT_headers-02-bung.jpg

[Odinson]

OK well I'm going to guess #2 is the right position on both sides. So inline directly in front of the factory bung.

I'll let ya'll know how it worked out.

[RacerX]

OK well I'm going to guess #2 is the right position on both sides. So inline directly in front of the factory bung.

I'll let ya'll know how it worked out.


You don't want a bung straight up. The O2 sensor and connector will not have enough room between it the tub. Parallel to the horizon @ #4 is perfect. Unless that bung is only seeing one cylinder. Isn't the merge collector cone further down??

[Odinson]

You don't want a bung straight up. The O2 sensor and connector will not have enough room between it the tub. Parallel to the horizon @ #4 is perfect. Unless that bung is only seeing one cylinder. Isn't the merge collector cone further down??

I guess that makes sense. Is it because it would turn into a mini chimney and burn out sensors too fast? Thats my guess.

I didn't even know there was a cone in there. I doubt it's one cylinder at factory narrowband on the SW since the second o2s would have screamed on all previous cars.

OK so now it sounds like #4 on both sides please.

Thanks so much. This place is better than walter at the local auto store and that guy was like 6'5" yoda of cars. :burnout:

[Kennyrauder]

I have KOOKS Headers & Magna Flow cats & mufflers..... UNBELIEVABLE SOUND.

[RacerX]

Just checked their merge collector and the bung placement is in the full exhaust stream. http://www.stainlessworks.net/technology/integrated-merge-spike.html Yes, about where #4 and where they have it in the pic and mirror opposite on the other. No with burning out sensor. It just won't fit straight up and it isn't optimal. Perfect is about 10 degrees above horizontal.

http://www.stainlessworks.net/skin/frontend/default/default/images/media/merge-spike-within-collector2.jpg

[Odinson]

So that sounds more like #3 to me? 10 degrees off the horizontal right? #4 would be underneath, pointing diagonally toward the ground.

Very cool image of the cone! I see what you mean about picking up 1 cylinder.

Or would between #3 and #4 be best?

[RacerX]

Becuase of the angle, it's hard to be precise with that picture of the bung. it would be about the 10:00 position on a clock looking down the tube from the engine on passenger side and about your 2:00 looking down the drivers side.

[Odinson]

Becuase of the angle, it's hard to be precise with that picture of the bung. it would be about the 10:00 position on a clock looking down the tube from the engine on passenger side and about your 2:00 looking down the drivers side.

I really appreciate your time. Thanks!

OK so it sounds like it should be at #2 or #3. That's about 10:00. I'm going to ask for #3 since the cone might make it miss a read for the pipe on the far side.

OK I think #3 (in line with but behind factory bung).

How close is the SW factory bung to the firewall? Is there room for one more sensor next to it on the firewall side?

[dmjarosz]

Is it safe to run long tubes with a stock tune?

[StainlessWorks]

Due to the higher exhaust velocity of the long tube design, you will need a tune!

[StainlessWorks]

Today is the last day for the group buy. Thanks to all those who have signed up already, please make sure to submit your info by midnight!!!

[justbob]

Start a new one week only 20% off thread and watch the orders go up. Times are still tough for many.

I have the money, but timing is never "right" for a couple grand, at least for most. But I would commit for a full set if that were the case. I've owned mine eight years, what's another year is what I hear a lot. I made my own LT's and X pipe out of a set of Mac's and love it, but that was more out of boredom as they are mild steel and I don't expect them to last.. Not even sure if I would install the LT's as I plan to go twins quite possibly this winter, but this set would look great sitting and waiting incase I were to change gears.

You have a great product, everyone here including me knows it. It's just getting hard to justify spending big bank on these old cars for most.



Sent from my Ally while ruling the world from my toilet.

[StainlessWorks]

Thanks for all the feedback and comments about our SW headers and exhaust. The group buy is going very well as we had a total of nine participants.

Stay tuned for some pictures and a video!

[na svt]

You should see a gain of 25-30 RWHP on a N/A car.

I picked up 50 RWHP when I bolted mine on!

My car was making 423 RWHP on the stock manifolds. Installed the KOOKS and power jumped to 475 RWHP!!!

Your before combo was FI with stock manifolds correct?

[na svt]

Is it safe to run long tubes with a stock tune?

If the combo is n/a you can run headers with a stock tune. The velocity inside the primary tubes is greater than the velocity in the manifold but it will not change your a/f enough to require a tune.


My biggest concern is noise. Right now with stock manifolds and rear cats gone and straight through tips the noise is absolutely perfect. If I accelerate mildly to moderately there is the correct amount of sound for a luxury performance car. If I get up to say 65 mph and settle down into a cruise there is literally no exhaust noise., which is perfect for me.

LTs will not make it the exhaust any louder.


from what I have learned I could see maybe 24-25 HP gain. :mad:

on a very good day and only if you are upgrading from stock.

[Odinson]

BTW finally decided on o2 bung location.

I went with none of the above. Did a mirror image of shipped bung. Same line as 1 & 4 but either 2 o'clock or 10 o'clock, whichever is available. Looks like factory is inner positions.

Behind factory bung too close to cat pipe.
Forward too close to internal cone.
Ideal position is at 10 o'clock or 2 o'clock.
Sufficient clearance for 2 or 10 across the underbody.

Pretty damn sure this will work. No worries for SW, my fault if I can't make it work.

Let you know how it works out.

[tbone]

Thanks for all the feedback and comments about our SW headers and exhaust. The group buy is going very well as we had a total of nine participants.

Stay tuned for some pictures and a video!

Video ready yet?

[loud2004marquis]

Stainless works posted a video on youtube yesterday.

[Odinson]

That vid
http://www.youtube.com/watch?v=En1Qp58_K8U&feature=plcp

[loud2004marquis]

This one:

http://www.youtube.com/watch?v=9z950Yxpaxg

[MOTOWN]

Sounds sweet!