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View Full Version : Flowmaster 40's vs. Magnaflows with stock exhaust



Eric91Z
09-03-2006, 10:57 AM
OK, thinking about adding just a set of mufflers to the MM with the stock setup and keeping the stock tips (at least until I can come up with a set of the non-resonator 3 1/2" stock style).

Anyway, looking for some input on the Flowmaster 40's and the Magnaflows with the stock cats and piping for now. Eventually I am going with Kook's and full 2 1/2" setup, but I want a little more noise for now, but I want it to be good noise.

Who has run either with the rest of the exhaust being stock. What did you like or dislike. I do plan on extending the tips and inch or so to help with any possible resonance that might develop at highway speeds.

Any and all input appreciated. Also, anyone have any exhaust clips of the stock exhaust with just Magnaflows or Flowmaster 40's and stock tips?

Also, does anyone have part numbers for the Flowmaster and Magnaflow that you would use with the stock setup?

Thanks,

rvaldez1
09-03-2006, 11:05 AM
HI! There are a ton of previous forums on this, but in any case, I just installed a couple of 4x9 2.25 o/c magnaflows on my crown victoria and rrtained the stock resonators. I like them alot more than flowmaster because they are not as loud, but definitely more throaty. At Idle they are barely noticeable but when you get on it there is a nice growl. Oh, did I mention 0 drone.

Eric91Z
09-03-2006, 11:08 AM
Yes, I know there are a number of different threads on individual reviews, but nothing I came up with comparing the two muffler sets on an other wise stock exhaust, including tips.

I would like something a little more throaty, a little louder than stock at idle, and deeper and louder than stock at WOT. Currently I think I get more noise (good noise, mind you) from the JLT CAI than from the exhaust at WOT.

Merc-O-matic
09-03-2006, 11:09 AM
I have Flowmaster Super 40's with otherwise stock exhuast system
including stock tips. Great sound at WOT and nice rumble at idle.
Very happy with set-up and plan to keep it that way.
Flowmaster Super 40's Part#: 952446 for 03-04 Marauder 2.25" pipe

Gotta Love It!:pimp:

P.S. Sorry no sound clip!
Go to Flowmaster Web Site..they have sound clips there for Super 40 series

rvaldez1
09-03-2006, 11:17 AM
Yes, I know there are a number of different threads on individual reviews, but nothing I came up with comparing the two muffler sets on an other wise stock exhaust, including tips.

I would like something a little more throaty, a little louder than stock at idle, and deeper and louder than stock at WOT. Currently I think I get more noise (good noise, mind you) from the JLT CAI than from the exhaust at WOT.

OK, I have heard both flowmaster super40s and magnaflows on a stock system, and wat your looking for is the reason I went with magnaflow. Not much louder at idle, and thoaty wth much more volume at WOT.I dont like the flowmasters because they sound a little raspy. I got mine from performancepeddler.com log in as "google" for a bigger discount.

67435animal
09-03-2006, 11:44 AM
OK, thinking about adding just a set of mufflers to the MM with the stock setup and keeping the stock tips (at least until I can come up with a set of the non-resonator 3 1/2" stock style).

Anyway, looking for some input on the Flowmaster 40's and the Magnaflows with the stock cats and piping for now. Eventually I am going with Kook's and full 2 1/2" setup, but I want a little more noise for now, but I want it to be good noise.

Who has run either with the rest of the exhaust being stock. What did you like or dislike. I do plan on extending the tips and inch or so to help with any possible resonance that might develop at highway speeds.

Any and all input appreciated. Also, anyone have any exhaust clips of the stock exhaust with just Magnaflows or Flowmaster 40's and stock tips?

Also, does anyone have part numbers for the Flowmaster and Magnaflow that you would use with the stock setup?

Thanks,

I've had both on my car. The Flowmaster 40s are superior to the Magnaflows. They are louder and sound better. Both mufflers will drone around 2500 RPM.

supa_carrot
09-03-2006, 02:37 PM
I haven't heard the Magnaflows, so I have nothing to say about them. I have the Flowmaster Super 40s with a complete stock exhaust system. They are much throatier than the stock muffllers, and quite a bit louder. They only drone around 25-35 mph when I'm crusing at this speed because the transmission has yet to shift. While on the highway and cruising at 60-70 mph no drone what so ever. You mentioned that you can hear your JLT over your stock exhaust at WOT, with the Super 40s this won't happen very much. When I hammer it, I hear the JLT when my RPMs are in the 3-4k range but after that nothing but the sweet music, from the exhaust.

Eric91Z
09-03-2006, 04:24 PM
I have always thought that a Mustang sounds best with Flowmasters. They just seem to be what you run on Ford products. When I finally go with the Kook's and 2 1/2" exhaust, will I keep the mufflers I put on, doubt it. But I want something to appease me for now....

ctrlraven
09-03-2006, 05:55 PM
flowmaster 40's with res delete tips in action, from idle to wot
http://thumbs.vidiac.com/fddd2e03-391d-45d0-a458-98310149bab5.jpg (http://videos.streetfire.net/video/fddd2e03-391d-45d0-a458-98310149bab5.htm)Click here to see Video (http://videos.streetfire.net/video/fddd2e03-391d-45d0-a458-98310149bab5.htm)

merc6
09-03-2006, 06:08 PM
I say flowmasters. I like my magnaflows but after comming in contact with a mm with flows I realized I don't stand out as much from the other V8's. I'm going to get an h pipe and see what happens from there. If not I already have a plan b. My main thing is find both cars with the setup cause we might like what you don't. one more ting is make shure the tips protrude from the bumper or the drone will be worse.

Eric91Z
09-03-2006, 06:44 PM
flowmaster 40's with res delete tips in action, from idle to wot
http://thumbs.vidiac.com/fddd2e03-391d-45d0-a458-98310149bab5.jpg (http://videos.streetfire.net/video/fddd2e03-391d-45d0-a458-98310149bab5.htm)Click here to see Video (http://videos.streetfire.net/video/fddd2e03-391d-45d0-a458-98310149bab5.htm)

That sounds really nice in the video.

I would love to check a couple different options out in person, but there are very few Marauders around here and even fewer that are on this list and around here with many modifications, let alone exhaust.

I am leaning towards the Flowmasters with stock tips extended and inch or so.

Murader03
09-04-2006, 12:02 AM
I first had trhe cobra wexhaust manifolds that Dennis sells installed with the OEM mufflers. I also had the delete tips but didn't quite like the sound. Hoad flowmaster's installed and immediately had the OEM tips reinstalled as I considered it to noisy, after all I work mid-night till so I didn't want to wake up the neighbors or cats when I went to work. Till the day I traded the MM, I still thought the exhaust was too loud! I now have an '06 Mustang GT with maganflow axle backs' and am pleased with the sound and it don't wake the neighbors when I go to work!

RR|Suki
09-04-2006, 05:30 AM
magnaflows are more buzzy than flowmasters. You won't have a very clean girgle, and the on throttle is more a hum from the magnaflows

Marauderjack
09-04-2006, 01:02 PM
I have the 18" Magnaflows with TAF's "X" pipe and it is very crisp with a nice "gurgle" to it!!:beer: I really wanted to retain the "H" pipe but Todd talked me out of it for my power level with the ProCharger.....N/A it would not make much difference "X" or "H"...other than sound maybe?? :confused:

My next step is the hi-flow cat setup.....this week....I hope??!!:beer:

Marauderjack:rasta:

Eric91Z
09-07-2006, 09:32 AM
No matter when I go with, we need an offset inlet/center outlet setup, correct?

ckadiddle
09-07-2006, 10:14 AM
http://www.cardomain.com/ride/748029/1
See for the magnaflow model number I have on stock exhaust. I think they are a universal style. Sorry no sound clips yet, will try to get some soon. Quiet at idle and lower RPMs, awesome sound at WOT. Mild sounding when cruising at 70ish highway speeds. I live in a rather quiet neighborhood and don't want to annoy the neighbors when I get home in the wee hours.

IIRC, Todd (TAF) of Grand Muffler recommends a different model number Magnaflows for MMs.

Really it boils down to personal preference. I ran with no mufflers at all for a number of months. Sounded awesome, but bad drone on highway trip. And no quiet arriving home or leaving in the early hours. :) The Magnaflows my local muffler guy put on suit us fine for our uses, that is what is important. If I was a single guy, I probably would have old fashioned Cherry Bomb glass packs on it. :)

merc6
09-07-2006, 10:24 AM
*edit* Videos Added *edit*

Rev 1 (http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0398.flv)

<a href="http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0410.flv">Rev 2</A>

<a href="http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0393.flv">Rev 3</A>

<a href="http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0409.flv">Normal Drive</A>

<a href="http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0407.flv">Quick Drive</A>

<a href="http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0408.flv">Possible Drone</A>

TAF
09-07-2006, 12:14 PM
IIRC, Todd (TAF) of Grand Muffler recommends a different model number Magnaflows for MMs.

Yours is a 14" body muffler (#11235) with 2 1/4" nipples which is more "aggressive" sounding and takes a little more work/effert to install properly after removal of the stockers. I usually either recommend the #11255s if going into a stock system. It has 2 1/4" nipples and is easier to make work with the 2" lead-pipe from the stock H-pipe, as well as the 2 1/4" stock tailpipes. It does, however, have a 2 1/2" run through the muffler exactly like the #11256 which has 2 1/2" nipples and is easier to work with an aftermarket X-pipe which is usually 2 1/2".


Really it boils down to personal preference.

EXACTLY! ^^^^

Eric91Z
09-08-2006, 02:55 PM
Todd (TAF),

What do you guys chage for parts and labor, roughly, for 2 mufflers (like the Flowmasters) and tip extension? The quote I got today made me re-think this and just keep the money and wait until I can do the Kook's and full 2 1/2" exhaust with high flow cats and x-pipe. Now, it wasn't quite that much, but left me thinking the money could be saved or spent elsewhere for what I would actually be getting.

Flowmasters alone, through the shop, would be about $120/each. Yes, I can buy them cheaper online and take them in and save about $40/each, and bring the price down, but he always drags his feet some on installing customer supplied parts.

Ron
09-18-2006, 09:07 AM
Just found this thread.
I'm shopping for flowmasters also & keeping rest of the exhaust stock.

I was doing some homework here (this was the pt# referenced, note free shipping) https://www.justflowmaster.com/cgi-bin/shopper.exe?preadd=action&key=FLOV952446

A couple of questions.
1). Is the stock exhaust Stainless ?
2). What is the difference between the 40 series vs. super 40?

I don't want my MM Too loud & was considering the Delta Flow 40 series.
Any thoughts on them.

Loco1234
09-18-2006, 11:15 AM
I always hear people talk about Flowmasters etc.... What about BORLA?

TAF i'd be interested on your opinion on BORLA T-304 Stainless Steel mufflers custom fitted to a Marauder.....

Architect
09-18-2006, 12:48 PM
*edit* Videos Added *edit*
Rev 1 (http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0398.flv)
Rev 2 (http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0410.flv)
Rev 3 (http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0393.flv)
Normal Drive (http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0409.flv)
Quick Drive (http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0407.flv)
Possible Drone (http://s90.photobucket.com/albums/k280/merc6/Videos/?action=view&current=IMG_0408.flv)
Merc6, I hate to ask dumb questions...But....
These sound bites are of your Marauder with 18" Magnaflows...? Correct?
I really like the sound...:D
I'm running the Ford Racing Muffler with the "damper" flap that opens under WOT...It's more of a woosh sound...not throaty to me...
Thanks, Architect

TAF
09-18-2006, 01:34 PM
TAF i'd be interested on your opinion on BORLA T-304 Stainless Steel mufflers custom fitted to a Marauder.....

I only carry Flowmaster & Magnaflow. I feel they are the best in the marketplace...period. Only dealings we have with Borla is cutting them off.

Loco1234
09-18-2006, 01:40 PM
Awh I generally use Borla for performance applications....

I like the fact their T-304 Stainless and the car will be gone long before the exhaust will rust.

Plus Borla has very little inside them to make them fancy.... just big, open, stainless pipes....

I have a set of Borlas on my Mauarder and Im fairly happy with them...
although there is a slight 2-3 thousand rpm droan... i think if I would have gotten the Borla mufflers that were an inch to two longer I wouldn't have that resonace but I could be mistaken....
It's certainly not a tested therory!

Marauder_Santa
09-18-2006, 01:55 PM
Thought I'd chime in. Had the flow master 40's with the stock exaust for over a year. was very happy with the sound and added performance.

After going to the shorty header and new High Flow cats I have the 18 inch Magna Flows.

KillJoy
09-18-2006, 05:37 PM
Only dealings we have with Borla is cutting them off.


:rofl:

KillJoy

ductman
09-19-2006, 07:07 AM
I just put on the super 40s with all stock exhaust and they sound great. They are definately louder, but not too loud. There is no real noticable drone, and sound great from idle to WOT. I had the magnaflows on my impala and they definately seemed more raspy/poppy then the flowmasters do. I am happy with the flows, but it is a personal preference so if you are that peticular try to go to a Marauder meet and listen to some others

Eric91Z
02-22-2007, 07:17 AM
OK, I ordered a set of the Flowmaster Super 40's: PN: 952446 and will have them installed a week from tomorrow on my birthday. The shop got them in yesterday and I had to stop by as they needed me valve stem "key" as they are doing new tires, too, so I looked at the mufflers. Pretty cool looking, but not as big as I thought.

Flowmaster website says they have the following dimensions:

5" x 10" x 13"

which looks about right compared to what I saw. Just wondering if these will be a direct "cut out the old, weld in the new" for this shop of if some extension pipe will be used. I only ask as they are 13" long, but those running the Magnaflow are running the 18" version.

Thoughts, input?

ckadiddle
02-22-2007, 07:48 AM
See post 16 above for a link to my cardoman page. On page two, you can see/hear a short clip of me running by myself at track at MVIV race day. The model number of the magnaflows I have on the car is listed on my page 1. Magnaflows at WOT sound pretty nice. Stock exhaust and tips otherwise.

I did have the tips extended a while back (while I was having the car in the air for brake work), there is no noticeable effect on noise or drone that I can discern.

CanadaMarauder
02-22-2007, 09:29 AM
Have sounds clips of stock vs. flowmaster super40's and res/delete tips...PM me if you want them..

Merc-O-matic
02-22-2007, 09:34 AM
They will cut out the stock mufflers and install the new
Flowmasters....may need 1-2 reducer cones to conect the
the pipes. Great sound!

Gotta Love It!

Sharky
02-23-2007, 06:09 PM
I love my Magnaflows - they have a nice burble but they're not too loud.

But there is a bad drone right at 40 mph - if I stick my toe in the throttle it will downshift and hold it past 45 where the drone turns into a burble again.

Would a crossover pipe solve this?

KillJoy
02-23-2007, 06:12 PM
I love my Magnaflows - they have a nice burble but they're not too loud.

But there is a bad drone right at 40 mph - if I stick my toe in the throttle it will downshift and hold it past 45 where the drone turns into a burble again.

Would a crossover pipe solve this?

Did you extend your Tips out about 1-1.5"???

KillJoy

Sharky
02-23-2007, 06:17 PM
Did you extend your Tips out about 1-1.5"???

KillJoy

No, they end right at the bumper cover cutouts. Should they extend past it?

My muffler guy can install a pair of MM tips, but I think they would look funny on an otherwise stock GM.

KillJoy
02-23-2007, 06:18 PM
Ahhhhhhhhh.....didn't realise on a GM.

Put the MM Tips on 1.25" Extended :D

And, no....they WOULD NOT look dorky :up:

KillJoy

PS - Dorky is in the eye of the beholder....

Sharky
02-23-2007, 06:26 PM
Ahhhhhhhhh.....didn't realise on a GM.

Put the MM Tips on 1.25" Extended :D

And, no....they WOULD NOT look dorky :up:

KillJoy

PS - Dorky is in the eye of the beholder....

:D OK, I'll look into it.

RaceLegend79
02-23-2007, 08:00 PM
:burnout: I have regualr 40 series Flows with Magnaflow high flow cats, and everyone who has heard the setup says its perfect. It doesnt eat any more gas, except at WOT, it also had a nice HP spike. Just my opinion. But do whatever floats your boat it your car man.
:banana2:
PS I also have just a drop in K&N

Marauderjack
02-24-2007, 04:50 AM
"H" pipe type cross over will make more power and accent the "Burble"!!:beer:

StevenJ
02-25-2007, 10:18 AM
Yes, I know there are a number of different threads on individual reviews, but nothing I came up with comparing the two muffler sets on an other wise stock exhaust, including tips.

I would like something a little more throaty, a little louder than stock at idle, and deeper and louder than stock at WOT. Currently I think I get more noise (good noise, mind you) from the JLT CAI than from the exhaust at WOT.

If you are getting a set of Kooks, don't bother to buy mufflers. The Kooks kit comes with matching 18 inch magnaflows. Just letting you know!

Texas Boy
08-15-2007, 09:43 AM
i got 44s with x-pipe and its not loud at alllllllllll dont get magnaflow xpipe