Flowmaster Super 40s anyone?

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Feb 28, 2005 | 04:22 PM

REDEVIL

Thread Starter

Burning Brakes

Joined: Nov 2002

Posts: 1,187

Likes: 265

From: Huntington Beach CA

Flowmaster Super 40s anyone?

I recently had some Flowmaster 50's installed on my '90 coupe and they don't quite have the sound I'm looking for. I want something with some more sound. Does anyone have the new Flowmaster Super 40's on an L98 out there? Are they similar in sound to the original 40 series mufflers? Thanks

Feb 28, 2005 | 05:57 PM

1990dtgL98squared

Racer

Joined: Jul 2004

Posts: 395

Likes: 0

From: Wescosville Pa

I had the Force II 50 series on mine. Too quiet. Now I'm going with original 40's...they should be on tomorrow if all goes as planned.

I heard the super 40's and 40 deltas are as loud outside, but quieter inside. Me, I want loud all the way around.

-Dave

Feb 28, 2005 | 06:06 PM

BiZ

Le Mans Master

Joined: Aug 2000

Posts: 7,760

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From: Lost in the mountains of TN

40s have a ton of resonance. But I think they will give you the sound you are looking for.

Feb 28, 2005 | 06:11 PM

Kwikerthanu

Pro

Joined: Nov 2004

Posts: 716

Likes: 0

From: Evansville IN

St. Jude Donor '05-'06

I have the Flowmaster Super 40's on my '92 LT1. At first I still had the factory resonator on, but I recently had it replaced with an X-pipe. Sounds very healthy now. Getting a little resonance inside the car now, but only at certain RPM's.

Would I recommend them? Yes! Go for it. You'll be glad you did. These also have the black cases on them, not the silver. I would have just painted them black anyway.

Feb 28, 2005 | 06:17 PM

_twisted_

Safety Car

Joined: Nov 2004

Posts: 4,991

Likes: 5

From: The Pines South Jersey

Part #'s

You guys using 40's how about posting the part #'s your using, I'm looking at 40's also but havent decided, maybe you input on part numbers will push me over the edge.

Feb 28, 2005 | 06:21 PM

REDEVIL

Thread Starter

Burning Brakes

Joined: Nov 2002

Posts: 1,187

Likes: 265

From: Huntington Beach CA

Quote:

Originally Posted by jd_v3tt3

You guys using 40's how about posting the part #'s your using, I'm looking at 40's also but havent decided, maybe you input on part numbers will push me over the edge.

Exactly. Are you using the center inlet/center outlet ones? If so, did you have to modify the rear exhaust bracket for them to work? I currently have the dual outlet 50's and I want a single center outlet for a 4" round stainless steel tip, but the exhaust hanger mounts right between the two outlets. I hope that made sense.....

Feb 28, 2005 | 06:50 PM

Mo_Bandy

Melting Slicks

Joined: Dec 2000

Posts: 2,719

Likes: 60

From: Fremont Oh

On my 89 I had 42540 and added tips to it. Sounded good but if you have like a 2.59 rear end the resonace may drive you out of the car. I had 3.07s and it woud resonate around 1500 as I recall...

Mo

Feb 28, 2005 | 07:15 PM

Kwikerthanu

Pro

Joined: Nov 2004

Posts: 716

Likes: 0

From: Evansville IN

St. Jude Donor '05-'06

Here's the part no.'s for the Super 40's, 952546.

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Feb 28, 2005 | 09:33 PM

89vert

Drifting

Joined: Mar 2004

Posts: 1,504

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From: Byron Center MI

I'm using the 425501-L 425501-R They fit on the stock Y. I have a sound clip I can e-mail to you. I should add that I have gutted the cats and have the stock manifolds. Some resonance but not too bad for the mile I put on it a year.

Mar 1, 2005 | 12:51 AM

#10

black_89_vette

Melting Slicks

Joined: Nov 2000

Posts: 2,469

Likes: 6

From: Winchester Ontario

Here's a clip or two of the original 40 series Flowmasters. Resonance is big, but gotta love the sound.

http://temp.corvetteforum.net/c4/bla...e//burnout.wmv

http://temp.corvetteforum.net/c4/bla...taking_off.wmv

Mar 1, 2005 | 10:16 AM

#11

Steve85

Melting Slicks

Joined: May 2001

Posts: 3,270

Likes: 26

From: Winchester VA

Cruise-In V Veteran

Flow Super 40's

Flow super 40's

I liked the sound and also got alot of compliments. Took'em off because of resonance, your experience may be different.

Mar 1, 2005 | 11:15 AM

#12

REDEVIL

Thread Starter

Burning Brakes

Joined: Nov 2002

Posts: 1,187

Likes: 265

From: Huntington Beach CA

Quote:

Originally Posted by black_89_vette

Thanks guys for the sound/movie clips. Those sound and look great! I think I'll go with the Super 40's.

Mar 1, 2005 | 01:21 PM

#13

JJ 86

Safety Car

Joined: Feb 2003

Posts: 3,849

Likes: 95

From: Springfield MO

Just installed these on my LT1. They sound great especially under wot but have just as much resonance at 2000 rpm as the orginal 40's do. This is on a stock a4 with 3.07 gears.

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