Restrictive Stock Exhaust?

[Silver03MM]

I'm looking to do a budget exhaust on my MM but I would like to know what the best way is to approach it. I know the MM has 4 cats (2 on eat side), 2 resonators, and 2 mufflers. Now I would like to get a little more power and sound out of my car. Would removing the resonators and putting on flowmaster mufflers or something help or should I just bite the bullet and do the whole exhaust? What do some of you guys have?

[Zack]

Take 2 cats off and leave the rest alone.

[fastblackmerc]

I had my entire exhaust redone.

See it here;

http://www.motorcitymarauders.com/forums/showthread.php?t=2138&highlight=fastblackmerc

More sound, I'd remove all four cats and replace them with two hi-flo cats, change the mufflers and get resonator-delete tips.

[dohc324ci]

Cat delete and swap the mid pipes and remove the resonators and see how ya like it.

[musclemerc]

If you want it on the cheap, do a full midpipe swap with high flow cats. Leave the rest of the system intact. Heres a good link:
http://www.mustangandfords.com/techarticles/engine/mdmp_0904_2003_mercury_maraude r_exhaust_install/index.html

If you want a little more install some shorty headers

[Silver03MM]

Are there sensors going to eat cat? Would I have to put in a special line to delete two of the cats?

[tbone]

Are there sensors going to eat cat? Would I have to put in a special line to delete two of the cats?

No and no.

[Motorhead350]

Used Kooks Headers, high flow cats, stock mufflers. It's a beautiful thing.

[kphillykid1023]

i cant find a shop to take out my resonators in my tips

[justbob]

i cant find a shop to take out my resonators in my tips
It's a really easy job? I was charged $30.00 for both. They cut them off right at the start of the chrome, hammered out the pipe and crush gasket, and welded them back on. Find a smaller lesser known shop.

[Jeronimojc]

Take 2 cats off and leave the rest alone.

I like the idea of removing 2 cats, at least to start with. Has anyone here done that alone? If so, how did you like the sound? I assume I would still pass emissions.

I also like the idea of removing 2 cats and removing the resonators in the tips. Has anyone done this alone?



I'm looking to do a budget exhaust on my MM but I would like to know what the best way is to approach it. I know the MM has 4 cats (2 on eat side), 2 resonators, and 2 mufflers. Now I would like to get a little more power and sound out of my car. Would removing the resonators and putting on flowmaster mufflers or something help or should I just bite the bullet and do the whole exhaust? What do some of you guys have?

Please post what you decided to do and how you liked the end result.

[justbob]

I like the idea of removing 2 cats, at least to start with. Has anyone here done that alone? If so, how did you like the sound? I assume I would still pass emissions.

I also like the idea of removing 2 cats and removing the resonators in the tips. Has anyone done this alone?




Please post what you decided to do and how you liked the end result.
Many of us here have gone that route. Here is mine with second set of cats removed, Flowmaster delta 40's, and res. deleted.
e9j_Nd_x-0E

[Ktorres1]

How would flowmaster super 40's compare in performance to our stock mufflers? Beside's the fact I love the way they sound, is there any performance benefit?

[ctrlraven]

How would flowmaster super 40's compare in performance to our stock mufflers? Beside's the fact I love the way they sound, is there any performance benefit?
Go with AeroTurbine AT2525 mufflers. They will sound better and out flow Flowmaster mufflers.

[FX1]

why the hell did they put 4 cats on are cars? thats bs

[Ktorres1]

It's hard to go against your advice ctrlraven, it's going to be a tough choice but will look into it as I'm ready to have this as well as steeda ud pulley as my next must do mod!

[ctrlraven]

why the hell did they put 4 cats on are cars? thats bs
Most of the vehicles that have them are V8 cars and don't have resonators. 2nd set of cats does double duty.

It's hard to go against your advice ctrlraven, it's going to be a tough choice but will look into it as I'm ready to have this as well as steeda ud pulley as my next must do mod!
If you do choose the Aeros get them from here
http://www.ourdealsrock.net/aeroexhaustat2525.aspx

[risky]

theres a guy that haves the aeros for 99.95 on ebay. free shipping also he haves 6 available. seller is mandrelbends

[ctrlraven]

theres a guy that haves the aeros for 99.95 on ebay. free shipping also he haves 6 available. seller is mandrelbends
Good looking out, I didn't think they sold Aeros anymore. Two of my friends work there and they also do the over axle pipes for local CAM members.

[BAD FIVE O]

http://www.streetfire.net/video/mercury-marauder-sound-clip-2_2057313.htm

http://www.streetfire.net/video/mercury-marauder-sound-clip_2057312.htm


only $80 installed!!!!!!!!:beer:
for more aggressive sound go with 14" like Mike SID210SA

[JOEMERC]

I agree with you,but i think biggest restriction is the manifolds and ends with the cats.

[ntd]

2nd cats MIA & Magnaflow 18" mufflers

http://www.youtube.com/watch?v=-Mue56v7i-c

[musclemerc]

You are correct... But the restriction ends with the 1-7/8" H pipe



I agree with you,but i think biggest restriction is the manifolds and ends with the cats.

[Ktorres1]

What does an x-pipe cost?

[Jeronimojc]

Wasn't sure if this's been posted before.

http://www.mustangandfords.com/techarticles/engine/mdmp_0904_2003_mercury_maraude r_exhaust_install/index.html


2003 Mercury Marauder Exhaust Install - Finding Grunt

Mercury's Short-Lived '03-'04 Marauder Has Lots Of Potential And We Unlock It With Exhaust And Tuning
From the April, 2009 issue of Mustang & Fords
By Huw Evans
Photography by Huw Evans


Today there are all kinds of options when it comes to upgrading the performance of your car. Two of the most common, it seems, are a cold-air intake and an aftermarket exhaust. Granted, a lot of Fords in recent years have benefited from reasonably efficient factory pipe and muffler systems, but there's always room for improvement. Take the case of the late and lamented Mercury Marauder. Spun off the evergreen Grand Marquis fullsize sled, the Marauder was a proper-sized muscle car, the likes of which hadn't been seen since 1970. A lot was promised initially, including a supercharged Two-Valve 4.6 engine, and even a concept two-door convertible was built. As this car emerged, it was powered by a version of the '03 Mustang Mach 1 engine that, while exotic for a muscle car, didn't have the low-end oomph to get one of these near-4,200-pound beasts moving off the line at a torrid pace.

High Is Good, But We Want Low
Yours truly remembers testing one of these cars when they were new. Whilst a bit slow to start, the cammer engine came into its own above 3,500 rpm. Unfortunately, it was a bit too late to really get the advantage in the whole 1,320 grudge match, the kind of thing muscle cars were really built for. Our testing of the day (without cheating, I might add) yielded a string of low 15- and high 14-second e.t.'s. On numerous occasions our test victim was run against its arch-rival, the '94-'96 Impala SS, which had 79 more cubic inches, and our Marauder's 60-foot times were slower. By the time we really got up to speed, we ran out of track. So while the mph was consistently higher than the big Chevy's, our e.t.'s remained slower-we couldn't have that.

Gary Keilhauer, a product specialist at Donway Ford SVT in Scarborough, Ontario, felt the same way. He liked the look of the Marauders ever since he first laid eyes on one and just over a year ago hit pay-dirt when he picked up a low-mile mint example for a reasonable sum. However, like us, he felt the car needed a bit of extra va-vavoom, so he sat down and contemplated a few upgrades. We've said since day one that this car needs a tune, an exhaust, and 3.73 gears to make it really fly. All the basics were already in place. Keilhauer, wanting to add a bit of excitement, decided he'd begin his journey down that road, but considering the car was a daily driver, he left out the gears initially. That meant an exhaust upgrade and a custom tune were still in order. Would they provide the extra thrust and power he was looking for? Let's find out, shall we?

The article includes pictures of the process (did not copy those here).

[musclemerc]

I posted the same info on page 1

[Jeronimojc]

Indeed. Double posted. My bad.

[Ktorres1]

Typical x-pipe cost anyone?

[musclemerc]

^^ the X section in the article is like $70.00 from performance peddler.co
$99.99 from Summit Racing

[RacerX]

I like the idea of removing 2 cats, at least to start with. Has anyone here done that alone? If so, how did you like the sound? I assume I would still pass emissions.

I also like the idea of removing 2 cats and removing the resonators in the tips. Has anyone done this alone?




Please post what you decided to do and how you liked the end result.

One of the first things I did is remove the secondary cats. Sound was better. It doesn't effect emissions because your second set of O2s are after the primary cats and before the secondaries. They're reading upstream. Meow!

[Rockettman]

If I'm considering changing only from the exhaust manifolds back to the mufflers (keeping the originals mufflers in); what size do the new high-flow cats and x-pipe need to be?

[JOEMERC]

The only thing i changed was the mufflers what a differance it makes in sound but still too quiet.they are cheery bomb turbos from auto zone 25.00 apiece.i priced around for 2nd cats removel got prices like 150.00 ,is that alot ?

[ctrlraven]

Not really, depends on where you live and the state laws with the cats and emissions.

Going to get my quote on a custom cat-back made tomorrow, if they have enough time and it's not godly expensive I'll ahead and get it done. 2.5" mandrel bent from where the 2nd cats were to the tips.

[musclemerc]

The answer to your question is on page 1, I posted a link that contains all the info you need to do a midpipe swap.


If I'm considering changing only from the exhaust manifolds back to the mufflers (keeping the originals mufflers in); what size do the new high-flow cats and x-pipe need to be?

[Rockettman]

Many of you have posted that you've removed the 2nd set of cats.
Wondering if you've all just removed the 2nd set and left the rest alone; OR removed the 2nd set and replaced what's left with high-flows?

[ctrlraven]

Remove the 2nd set, replace with straight pipe and left the rest alone.

[Rockettman]

Remove the 2nd set, replace with straight pipe and left the rest alone.

This obviously will increase flow "on the cheap"; does this create a bit more "grunt" in the exhaust tone?

[ctrlraven]

This obviously will increase flow "on the cheap"; does this create a bit more "grunt" in the exhaust tone?
Yes it will increase the exhaust note sound some, enough to notice if you know the sound of your car very well.

[Rockettman]

what about feel "under your foot"? Is there any noticeable difference (I know it won't be huge), in the power of the car? ie: low end; mid range?
I ask because I'm thinking of possibly doing something with the exhaust this weekend (if time permits) and not sure whether to spend $100 or $800. Of course I'd rather spend the less!

[musclemerc]

Remember you get what you pay for.

I would invest in a full 2-1/2" midpipe swap first along with high flow cats and your choice of H, X, or Prochamber

[Paul T. Casey]

It may be illegal in WA to tamper with any of your emission equipment. That said, I doubt you'll drown any polarbears be removing the secondary cats. If you have a state emission exam, just do that prior to doing your exhaust work. Many states relax the laws after 100,000 miles, so then you may replace with approved aftermarket parts. Which brings me to a question. If everyone with a Marauder did the secondary cat delete, would my oil bill go down?

[Rockettman]

Is there much of a difference in flow for an "H" or "X"?
My thinking would be that the "H" is good for low end flow (due to the shape) equalling out the bank pressure per side; where the "X" is good for high end flow because it flows out as opposed to into each side. Could be totally off base though (what do I know...I make TV for a living!)

I have to add that the full mid conversion - leaving the stock mufflers - is over $800 Canadian money...oh...plus the 13% tax! NOT CHEAP! I may just have to cough it up though.

[ctrlraven]

what about feel "under your foot"? Is there any noticeable difference (I know it won't be huge), in the power of the car? ie: low end; mid range?
I ask because I'm thinking of possibly doing something with the exhaust this weekend (if time permits) and not sure whether to spend $100 or $800. Of course I'd rather spend the less!
I noticed right off the back slightly better mid-range power feeling and I knocked off a tenth of a second at the 1/4 by doing it.


Is there much of a difference in flow for an "H" or "X"?
My thinking would be that the "H" is good for low end flow (due to the shape) equalling out the bank pressure per side; where the "X" is good for high end flow because it flows out as opposed to into each side. Could be totally off base though (what do I know...I make TV for a living!)

I have to add that the full mid conversion - leaving the stock mufflers - is over $800 Canadian money...oh...plus the 13% tax! NOT CHEAP! I may just have to cough it up though.
There has always been a big debate between H and X. From my personal experience H-pipe makes low end sound/power better where X-pipe flows better at higher rpm range. I've always stuck with an H-pipe with vehicles under 400 hp, above that I would definitely go with an X-pipe.

I just got my quote for all my work new 2.5" stainless pipe mandrel bent pipe including custom H-pipe from the stock manifolds back for $700 US. I'll have to pick up 2 high-flow cats myself but I can get those for $160 US.

[boatmangc]

Has anyone eliminated the primary cats?
I kinda think mine were hurt when I pushed melted piston through them

[Ktorres1]

Make sure you post up some new videos when she's all set.

[musclemerc]

An H pipe also has an old school grumble, the X pipe is a little raspy.
The prochmber is a combination of both. $800 for a midpipe swap seems high no matter how you look at it.


Is there much of a difference in flow for an "H" or "X"?
My thinking would be that the "H" is good for low end flow (due to the shape) equalling out the bank pressure per side; where the "X" is good for high end flow because it flows out as opposed to into each side. Could be totally off base though (what do I know...I make TV for a living!)

I have to add that the full mid conversion - leaving the stock mufflers - is over $800 Canadian money...oh...plus the 13% tax! NOT CHEAP! I may just have to cough it up though.

[Rockettman]

Musclemerc:
I called 3 separate places after reading the Modified Mustang's article you posted the link to. $800 plus the 13% tax was the cheapest I could get using "other than" Magnaflow for just the midpipe swap.
Just a note: the system in the article with all Magnaflow products...$1200 plus tax!

[Rocknee]

Grand Marcs have them too

[Jeronimojc]

Any suggestions for high-flow cats? Just evaluating different options.

[musclemerc]

Ha! I post Magnaflow high flow cats all the time for $93.00 US shipped from performancepeddler.com (http://www.performancepeddler.com), the Magnaflow X section is also available from the same vendor for $69.00 US shipped.

I like the idea of keeping the stock mufflers. They're SS Turbo mufflers.

The real cost is getting a competent shop to do the bending, welding, and O2 bungs. The guy's in the article used crushed bent pipe, mandrel bent is far better, but ANYTHING is better than the stock mid section that starts 2-1/2" and shrinks down to 1-7/8" at the H.



Musclemerc:
I called 3 separate places after reading the Modified Mustang's article you posted the link to. $800 plus the 13% tax was the cheapest I could get using "other than" Magnaflow for just the midpipe swap.
Just a note: the system in the article with all Magnaflow products...$1200 plus tax!

[Rockettman]

Does it matter the the size of the actual "H" is?
I'm thinking of removing the 2nd cats (so it's still 2.5"); and having the piping all redone in 2.5" back to the mufflers; creating a new "H" in the middle.
(I believe the inlet of the stock mufflers is 2.5" correct?)

[musclemerc]

The stock mufler inlet is 2" OD and 1-7/8" ID

[Rockettman]

The stock mufler inlet is 2" OD and 1-7/8" ID
With that being the case with the pipe differences from front to back;
is it worth having the pipes created/changed as my suggestion above; or as Zack and Crtlraven stated much earlier, just remove the cats and leave the rest alone? I mean the new pipes will just go down to 1 7/8" anyway when it gets to the muffler.

[ctrlraven]

Any suggestions for high-flow cats? Just evaluating different options.


Ha! I post Magnaflow high flow cats all the time for $93.00 US shipped from performancepeddler.com (http://www.performancepeddler.com), the Magnaflow X section is also available from the same vendor for $69.00 US shipped.

I like the idea of keeping the stock mufflers. They're SS Turbo mufflers.

The real cost is getting a competent shop to do the bending, welding, and O2 bungs. The guy's in the article used crushed bent pipe, mandrel bent is far better, but ANYTHING is better than the stock mid section that starts 2-1/2" and shrinks down to 1-7/8" at the H.
I got my Magnaflow metalic spun 2.5" cats for $80.86 each with free shipping.
http://www.ourdealsrock.net/search.aspx?find=59956
Coupon code is "Magnaflow"


With that being the case with the pipe differences from front to back;
is it worth having the pipes created/changed as my suggestion above; or as Zack and Crtlraven stated much earlier, just remove the cats and leave the rest alone? I mean the new pipes will just go down to 1 7/8" anyway when it gets to the muffler.
If money is tight just remove the 2nd set of cats but if you have the funds to do it all go for it or just do it in section ie: 2nd set of cats, then new mid-pipe, keep stock or replace mufflers then get new tailpipes.

[Rockettman]

I really don't know if emissions testing (it's done every 2 years here), will pass with the 2nd cats removed. Unfortunately there is really no way to find out.

[ctrlraven]

I really don't know if emissions testing (it's done every 2 years here), will pass with the 2nd cats removed. Unfortunately there is really no way to find out.
Removing the 2nd set of cats shouldn't cause you to fail, it will not throw any check engine lights and if they do visual inspection just show them the front to. The rears cats sit where about the transmission cross member is, if they ask why there is different piping there tell them it had to be cut out for the trans cross member to be removed when the trans came out. ;)

If you do the whole system including removing 1st and 2nd set of cats the new cats will be placed where the 2nd set of cats were in plan view for inspection.

[Rockettman]

This maybe such an obvious question then (but of course I ask 'cause I don't know):
but if there are not really needed (2nd cats), why did Ford put them there?
(My only thought here is maybe so they weren't a problem with California Laws?)

[ctrlraven]

My 1989 Ford Mustang 5.0 has 4 cats on it. My guess would be to help with emissions and 2nd set help lower exhaust noise instead of having a resonator inline. If you were to remove just the rear cats you'll notice the exhaust sound level difference. Most states here in the US that have some sort of exhaust sound decibel law. I know in my state passenger cars have to be 87 or 89 db anything more than that a cop could write an exhaust noise violation and/or equipment repair order to have it remove and replaced with something quieter.

I also had a 1995 Mercury Cougar 3.8 V6 with 4 cats and a resonator since it was single exhaust exhaust. I removed the resonator and the car was much louder, didn't have to replace the stock muffler since it would of been even louder and possible too loud for my liking. I ended up swapping the V6 out for a 4.6 V8 down the road anyways.

[Ktorres1]

So is it fair to say that the stock mufflers aren't restrictive yet that our car's breathing troubles lay more so in the piping?

[ctrlraven]

So is it fair to say that the stock mufflers aren't restrictive yet that our car's breathing troubles lay more so in the piping?
Yes that would be fair to say from the just of what I've understood.

[musclemerc]

That is correct. The main restriction lies in the mid pipe section, the stock mufflers are fine. Get under your car with a micrometer and measure the downpipe and H section yourself. Get rid of the small pipe and the flow will be improved


So is it fair to say that the stock mufflers aren't restrictive yet that our car's breathing troubles lay more so in the piping?

[Rockettman]

...but if the muffler inlet is down to 2" OD, doesn't that make the muffler a restrictive part in the system too?

[musclemerc]

^^Correct.... But is'nt that what most mufflers do? Some type of restriction?

The diffrence is the length of the restriction. From the 2nd cat to the stock muffler is way longer than the restriction starting at the muffler inlet. The restriction drops from like 3-1/2' down to 24"~26".

After leaving the muffler it hit's 2-1/4" pipe

[Rockettman]

So based on that - if I were to leave in the 2nd cats (for emissions because I'm unsure - although everyone says it shouldn't be a problem), the cats having an outpipe of 2 1/4", and the tail pipes having a size of 2 1/4"; if all the piping from the 2nd cats to the tails were replaced with 2 1/4" and new mufflers (my choice), I should loose tons of restriction?
But...
If I do eliminate the 2nd cats - I should make all piping 2 1/2" with outlet of 2 1/4" on the new mufflers - should solve restriction problem too?

Either way solves this?? (I don't want to change any piping after the mufflers)

[babbage]

So based on that - if I were to leave in the 2nd cats (for emissions because I'm unsure - although everyone says it shouldn't be a problem), the cats having an outpipe of 2 1/4", and the tail pipes having a size of 2 1/4"; if all the piping from the 2nd cats to the tails were replaced with 2 1/4" and new mufflers (my choice), I should loose tons of restriction?
But...
If I do eliminate the 2nd cats - I should make all piping 2 1/2" with outlet of 2 1/4" on the new mufflers - should solve restriction problem too?

Either way solves this?? (I don't want to change any piping after the mufflers)

I replaced my mid pipes and mufflers completely, with 2.25 mandrelbent stainless... Link in sig.

[musclemerc]

Correct! But for better volume the high flow cats are a must IMO


So based on that - if I were to leave in the 2nd cats (for emissions because I'm unsure - although everyone says it shouldn't be a problem), the cats having an outpipe of 2 1/4", and the tail pipes having a size of 2 1/4"; if all the piping from the 2nd cats to the tails were replaced with 2 1/4" and new mufflers (my choice), I should loose tons of restriction?
But...
If I do eliminate the 2nd cats - I should make all piping 2 1/2" with outlet of 2 1/4" on the new mufflers - should solve restriction problem too?

Either way solves this?? (I don't want to change any piping after the mufflers)

[Jeronimojc]

Just wanted to say thanks to all of you who have chipped in. This is a great community. :beer: I am learning a ton of things about our awesome cars.



Ha! I post Magnaflow high flow cats all the time for $93.00 US shipped from performancepeddler.com (http://www.performancepeddler.com/), the Magnaflow X section is also available from the same vendor for $69.00 US shipped.

I like the idea of keeping the stock mufflers. They're SS Turbo mufflers.

The real cost is getting a competent shop to do the bending, welding, and O2 bungs. The guy's in the article used crushed bent pipe, mandrel bent is far better, but ANYTHING is better than the stock mid section that starts 2-1/2" and shrinks down to 1-7/8" at the H.


I got my Magnaflow metalic spun 2.5" cats for $80.86 each with free shipping.
http://www.ourdealsrock.net/search.aspx?find=59956
Coupon code is "Magnaflow"


I am leanning towards a pair of high flow cats (or maybe all four it depends on $) and mid pipe replacement while leaving the stock mufflers. I am not after a very loud exhaust. This will all have to wait until I sell my Crown Vic.

[Rockettman]

If I leave the 2nd cats in place, is there any advantage / disadvantage to using 2.5" piping to build the new "H" pipe, while still keeping the stock tail pipes?

This would then be: 2.25" cat, to 2.5" through new mufflers, to 2.25" tails.

Is that just a waste of money for bigger piping? Hindering flow?

[musclemerc]

the outlet of the second set of cats is 2"

if you can make it work go for it.

[Rockettman]

Maybe someone can answer this one.

It would seem that these cars run better for everyday driving with 2.25" piping all the way through.
My '91 Mustang - when I had the catback installed 20 years ago - everybody upgraded to 2.5" FROM 2.25" on those.

Why would a car the size of the Marauder be happier on a smaller exhaust system?

Even the Flowmaster and Magnaflow upgrades to my '07 Dodge Magnum go from 2.25" to 2.5"...and that's a V6!
I'm not understanding something here!

(I posted this in Maple Leaf Maruaders area also)

[scruff]

if your planing on adding a blower in the future i would go with 2.5 all the way to the end if not do it in 2.25 all the way you,ll be glad you did

[ctrlraven]

Personally I would go with 2.5". The new Mustang GT's (2005 and present) all use 2.5" piping now.

It's better to plan now just in case you do plan on adding boost down the road, at least this way the exhaust won't have to be re-done.

The MM will enjoy the 2.5" at higher rpms.

[Rockettman]

As said earlier, the price of these jobs up here in Toronto are astromomical!
I simply cannot afford to do front-to-back all at once.
I can, however, afford the "H" and mufflers. It seems kinda weird to me if I get 2.5" out of the cat, then go to a 2.25" into the muffler, so they can empty into the exsisting tails.
I have a funny feeling I won't end up doing anything soon.

Ctrlraven: I asked you about your Super 40's cause the sound on your videos were really a sound I could enjoy.

[ctrlraven]

As said earlier, the price of these jobs up here in Toronto are astromomical!
I simply cannot afford to do front-to-back all at once.
I can, however, afford the "H" and mufflers. It seems kinda weird to me if I get 2.5" out of the cat, then go to a 2.25" into the muffler, so they can empty into the exsisting tails.
I have a funny feeling I won't end up doing anything soon.

Ctrlraven: I asked you about your Super 40's cause the sound on your videos were really a sound I could enjoy.
Is the places you have contact do crush bent or mandrel bent, also are they quoting you for aluminumized or stainless steel (409 is factory quality, fades but won't rust would be the cheapest)

To be honest at the time I loved my Super 40's but after hearing the Aeros I'm sold for life on the Aeros. Get what you think will make you happy. I will tell you the Aeros are louder when you get on the gas more than the Flows and also quieter at idle and cruising speed.

I just had my whole system replaced with 2.5" stainless mandrel bent, H-pipe and Aeros. It purrs ever so softly at idle and the sound at cruising speed was the quietest my exhaust has even been since it was stock. Once I slapped the loud pedal it sounds wicked! :burnout: :banana: