Exhaust Post your questions and suggestions about stock or aftermarket exhaust setups. Third Gen exhaust sound files and videos!

Magnaflow or Flowmaster?

Thread Tools
 
Search this Thread
 
Old Sep 26, 2019 | 11:47 AM
  #1  
J.C. Denton's Avatar
Thread Starter
Member
15 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: May 2008
Posts: 416
Likes: 82
From: Viersen, Germany
Car: 85 Iron Duke, 88 GTA and 92 TA
Magnaflow or Flowmaster?

Hey guys,

short question: What would you recommend? Flowmaster 80 muffler or Magnaflow 12265 Cross Flow muffler? What sounds better in your opinion?
Installed on my 92 is the Flowtech Afterburner but I don't like the sound very much. My 92 is a bone stock 305 TPI with stock Y-Pipe and cat, Dynomax 2,5" intermediate pipe and and Dynomax 2,5" end tubes. I just want to change the muffler itself, the rest of the system especially manifolds and cat have to be stock (strict visual inspection and cops over here in germany). Whats your opinion? Maybe some people here can post videos or soundfiles?

Thanks.
Reply
Old Sep 26, 2019 | 12:18 PM
  #2  
Tootie Pang's Avatar
Supreme Member
15 Year Member
iTrader: (2)
 
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Magnaflow or Flowmaster?

Huh. No one has ever asked this before. NOT.

I had a Flowmaster 80 on my stock 305 TPI. It sounded pretty awesome. But recently it was getting on my nerves so I switched to a Walker 18375 SoundFX Muffler which sounds more stock but still nice.

I will say this, I got a tune and the car sounds way cooler on the tune. I am curious about the Magnaflow. I have heard users really like them.

I am doing a 5.7L, cam, tune, and T-5 conversion with an aftermarket Y-Pipe and will see what the Walker sounds like after that. I may not be able to resist changing it out.

Last edited by Tootie Pang; Sep 26, 2019 at 12:23 PM.
Reply
Old Sep 26, 2019 | 12:21 PM
  #3  
Lakerman62's Avatar
Member
10 Year Member
iTrader: (4)
 
Joined: Jan 2013
Posts: 328
Likes: 7
From: Gresham Oregon
Car: 1985 Z28 & 1997 Z28 SS SLP
Engine: Sbc 305 TPI & LT1
Transmission: 700r4 and A4
Axle/Gears: 9 bolt Posi 323 & Posi 323
Re: Magnaflow or Flowmaster?

I have usually used magnaflow on my 3rd and 4th gen cars. I have been happy with performance and sound. I prefer the low key sound until WOT. FWIW
Reply
Old Sep 26, 2019 | 01:44 PM
  #4  
thtanner's Avatar
Supreme Member
iTrader: (1)
 
Joined: May 2015
Posts: 1,154
Likes: 89
From: Temecula, CA
Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: Magnaflow or Flowmaster?

I trashed my Flowmaster in favor of a Magnaflow, never looked back.

Flowmaster definitely earned the nickname Dronemaster. Lots of drone, not worth it for me.
Reply
Old Sep 26, 2019 | 02:00 PM
  #5  
midias's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2004
Posts: 4,527
Likes: 240
From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Magnaflow or Flowmaster?

Magnaflow all the way, flowmasters sound worse than my day after drinking dumps
Reply
Old Sep 26, 2019 | 02:12 PM
  #6  
T.L.'s Avatar
Supreme Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 1999
Posts: 3,011
Likes: 816
From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Magnaflow or Flowmaster?

I like Flowmasters for certain cars, but they don't sound good in thirdgens (80 series). I'd go with something else...
Reply
Old Sep 26, 2019 | 03:04 PM
  #7  
punkmaster98's Avatar
Supreme Member
10 Year Member
Liked
Loved
Community Favorite
iTrader: (5)
 
Joined: Aug 2011
Posts: 1,262
Likes: 196
From: Jackson NJ
Car: 1984 T/A
Engine: LQ4
Transmission: T56
Axle/Gears: Ford 8.8 4.10 gears
Re: Magnaflow or Flowmaster?

flowmasters sound terrible. Get a quality stainless exhaust
Reply
Old Sep 26, 2019 | 04:17 PM
  #8  
Tootie Pang's Avatar
Supreme Member
15 Year Member
iTrader: (2)
 
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Magnaflow or Flowmaster?

Which Magnaflow do I go with? Single Exhaust.
Reply
Old Sep 26, 2019 | 05:09 PM
  #9  
thtanner's Avatar
Supreme Member
iTrader: (1)
 
Joined: May 2015
Posts: 1,154
Likes: 89
From: Temecula, CA
Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: Magnaflow or Flowmaster?

Originally Posted by Tootie Pang
Which Magnaflow do I go with? Single Exhaust.
Amazon Amazon
Reply
Old Sep 26, 2019 | 06:11 PM
  #10  
Tootie Pang's Avatar
Supreme Member
15 Year Member
iTrader: (2)
 
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Magnaflow or Flowmaster?

Whooo. That's gorgeous. And pricey. That would be the only stainless thing on the whole car. What about just the muffler?
Reply
Old Sep 26, 2019 | 06:29 PM
  #11  
89TTOP's Avatar
Junior Member
 
Joined: Jul 2019
Posts: 4
Likes: 0
From: Patterson, CA
Car: 1989 Camaro IROC-Z
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3.08
Re: Magnaflow or Flowmaster?

Just replaced my stock system with the Magnaflow (16829). Very happy with the quality and sound.
Reply
Old Sep 26, 2019 | 07:11 PM
  #12  
69L48Z27's Avatar
Junior Member
 
Joined: Jun 2019
Posts: 44
Likes: 4
From: York, Pa
Car: 1989 IROC-Z
Engine: 5.7L
Transmission: 700R4
Re: Magnaflow or Flowmaster?

I choose Magnaflow when I do exhaust.
Reply
Old Sep 26, 2019 | 08:55 PM
  #13  
2knight's Avatar
Member
iTrader: (1)
 
Joined: Dec 2017
Posts: 252
Likes: 54
From: Bismarck, ND
Car: 1982 Trans Am
Engine: 5.7 ls1
Transmission: 4l60e
Axle/Gears: 3.23
Re: Magnaflow or Flowmaster?

magnaflow, nice rumble, no drone, and mean when you get on it, get flowmasters if you like loud and abnoxious
Reply
Old Sep 26, 2019 | 11:53 PM
  #14  
GASPEDDLER's Avatar
Senior Member
iTrader: (2)
 
Joined: Mar 2014
Posts: 728
Likes: 51
From: South Texas
Car: '89 Iroc Z28-15,100 Original Miles
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Limited Slip, 2.77 Ratio
Re: Magnaflow or Flowmaster?

Cammed Ls1 with Magnaflow exhaust

Last edited by GASPEDDLER; Sep 27, 2019 at 09:44 AM.
Reply
Old Sep 27, 2019 | 12:04 AM
  #15  
Jbuchanan's Avatar
Senior Member
 
Joined: Mar 2017
Posts: 528
Likes: 46
From: Sweet home Alabama
Car: 1987 GTA
Engine: 5.0
Transmission: Automatic
Re: Magnaflow or Flowmaster?

Loved flowmaster as a young guy, at 40 not so much anymore. The drone just gets on my nerves.
Reply
Old Sep 27, 2019 | 10:01 AM
  #16  
GASPEDDLER's Avatar
Senior Member
iTrader: (2)
 
Joined: Mar 2014
Posts: 728
Likes: 51
From: South Texas
Car: '89 Iroc Z28-15,100 Original Miles
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Limited Slip, 2.77 Ratio
Re: Magnaflow or Flowmaster?

You could always run open headers....
Reply
Old Sep 27, 2019 | 10:53 AM
  #17  
dmccain's Avatar
Supreme Member
10 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Mar 2014
Posts: 4,553
Likes: 806
From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Magnaflow or Flowmaster?

That's pretty funny stuff Arnold LOl.
Reply
Old Sep 27, 2019 | 02:42 PM
  #18  
427seven's Avatar
Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2019
Posts: 576
Likes: 507
Car: 1989 Firebird GTA
Engine: Motown Aluminum 427
Transmission: TH400/GVO
Axle/Gears: Dana 44 IRS 3.75:1
Re: Magnaflow or Flowmaster?

rule of thumb, low compression/small displacement - magnaflow. high compression/large displacement - flowmaster. PERIOD.
Reply
Old Sep 27, 2019 | 03:33 PM
  #19  
midias's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2004
Posts: 4,527
Likes: 240
From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Magnaflow or Flowmaster?

Originally Posted by 427seven
rule of thumb, low compression/small displacement - magnaflow. high compression/large displacement - flowmaster. PERIOD.

Good thing rules were meant to be broken because flowmasters don't flow or sound good
Reply
Old Sep 27, 2019 | 03:42 PM
  #20  
dmccain's Avatar
Supreme Member
10 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Mar 2014
Posts: 4,553
Likes: 806
From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Magnaflow or Flowmaster?

Magnaflow may outflow it but man my Flowmaster sounds good and ive run almost every muffler type they make for these cars Borla being my fave, flowmaster 2nd. Lookup " dmccain " on youtube and see for yourself how good a 3in Flowmaster system sounds on a stock Thirdgen
Reply
Old Sep 27, 2019 | 04:01 PM
  #21  
Tootie Pang's Avatar
Supreme Member
15 Year Member
iTrader: (2)
 
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Magnaflow or Flowmaster?

There was nothing like the sound of a built and tubbed 454 Nova with Flowmasters pulling into the street races back in the day.
Reply
Old Sep 27, 2019 | 09:08 PM
  #22  
Reddragon88gta's Avatar
Supreme Member
5 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Apr 2017
Posts: 1,149
Likes: 445
From: Northern NY
Car: 1988 Trans Am GTA and 1979 Trans Am
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: Borg Warner 9 bolt 3.27
Re: Magnaflow or Flowmaster?

Went with magnaflow cat and cat back exhaust on my L98 and love the sound. Sedate at idle or low cruise but sounds great when you step on it.
Reply
Old Sep 27, 2019 | 11:02 PM
  #23  
427seven's Avatar
Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2019
Posts: 576
Likes: 507
Car: 1989 Firebird GTA
Engine: Motown Aluminum 427
Transmission: TH400/GVO
Axle/Gears: Dana 44 IRS 3.75:1
Re: Magnaflow or Flowmaster?

you wouldn't be breaking MY rule by not putting a super 40 on a 355ci sb, what it sounds like is up to you
Reply
Old Sep 27, 2019 | 11:25 PM
  #24  
427seven's Avatar
Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2019
Posts: 576
Likes: 507
Car: 1989 Firebird GTA
Engine: Motown Aluminum 427
Transmission: TH400/GVO
Axle/Gears: Dana 44 IRS 3.75:1
Re: Magnaflow or Flowmaster?






flowmasters
Reply
Old Sep 28, 2019 | 07:08 AM
  #25  
vinny R's Avatar
Supreme Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2015
Posts: 1,765
Likes: 286
From: Florida
Car: 1991 Z28
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3:42 Auburn
Re: Magnaflow or Flowmaster?

Originally Posted by 427seven
Damn 427 that thing just sounds mean!
Reply
Old Sep 28, 2019 | 08:30 AM
  #26  
Manic Z's Avatar
Senior Member
20 Year Member
Liked
iTrader: (1)
 
Joined: Oct 2002
Posts: 905
Likes: 42
From: Hamilton Ontario Canada
Car: 1985 Camaro IROC-Z
Engine: 350
Transmission: GForce T-5
Axle/Gears: 10 bolt 3.73 posi
Re: Magnaflow or Flowmaster?

Meh, I still do 117 mph through the 1/4 with my 80 series.
Love the sound. 1 or 2 mph more isn't worth the change in sound imo.

Last edited by Manic Z; Sep 28, 2019 at 10:12 AM.
Reply
Old Sep 29, 2019 | 05:51 PM
  #27  
cuisinartvette's Avatar
Supreme Member
 
Joined: Feb 2006
Posts: 1,777
Likes: 27
From: Sanctuary state
Car: 67 ******mobile
Engine: 385 Solid roller
Transmission: T-56
Axle/Gears: 4.11
Re: Magnaflow or Flowmaster?

exactly put n what sounds good..mufflers are the last place Id look for power. Unless youre making a ton you wont feel a difference
OP if they are that strict look into walker or dynomax super turbo they are pretty quiet
Reply
Old Sep 29, 2019 | 06:45 PM
  #28  
88IROCvertZ's Avatar
Supreme Member
iTrader: (1)
 
Joined: Mar 2016
Posts: 2,406
Likes: 193
From: New England
Car: 1988 IROC Z Convertible
Engine: 305 TPI (LB9)
Transmission: 700 R4
Axle/Gears: G80 GU2
Re: Magnaflow or Flowmaster?

427seven and GASPEDDLAR those cars sound amazing!

Here’s a bone stock 305 TPI with Magnaflow...

Its quiet at idle and has some bark when you rev it up... The Flowmasters are louder... Depends what you’re looking for...

Reply
Old Jan 2, 2020 | 09:17 AM
  #29  
J.C. Denton's Avatar
Thread Starter
Member
15 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: May 2008
Posts: 416
Likes: 82
From: Viersen, Germany
Car: 85 Iron Duke, 88 GTA and 92 TA
Re: Magnaflow or Flowmaster?

So, I decided to go with the Magnaflow #12265... Best decision. Sounds absolutely great on my bone stock 92 5.0 TPI, not to loud, not to deep. Perfect for our german streets. Thanks guys!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mtaylor102
Exhaust
7
May 12, 2013 03:31 PM
dukie
Exhaust
8
Mar 17, 2010 10:02 PM
chitowncruiser
Exhaust
15
Dec 13, 2002 04:31 PM
TexasLT1
Exhaust
2
Jul 28, 2002 12:47 PM
pauls
Exhaust
2
Jun 29, 2002 02:44 AM




All times are GMT -5. The time now is 02:30 AM.