Loudest Muffler?
Thread Starter
Joined: Jan 2003
Posts: 1,613
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From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Loudest Muffler?
OK, so I have a custom exhaust on my Firebird:
3" mandrel-bent intermediate pipe
3" intlet, dual 2 1/2" outlet Flowmaster 40 muffler
2 1/2" tailpipes.
I'm looking for the loudest, nastiest, meanest-sounding 3" inlet, dual 2 1/2" outlet muffler to replace the Flowmaster ... it's too quiet, and I'm tired of that "Flowmaster sound".
I meed something loud enough to drown out my girlfriend when she insists on coming along and starts bitching because my dog has permanent shotgun.
I've thought about the SLP loudmouth, but I've got a lot of money in my exhaust, and would prefer to just replace the muffler.
Does anybody have any thoughts?
3" mandrel-bent intermediate pipe
3" intlet, dual 2 1/2" outlet Flowmaster 40 muffler
2 1/2" tailpipes.
I'm looking for the loudest, nastiest, meanest-sounding 3" inlet, dual 2 1/2" outlet muffler to replace the Flowmaster ... it's too quiet, and I'm tired of that "Flowmaster sound".
I meed something loud enough to drown out my girlfriend when she insists on coming along and starts bitching because my dog has permanent shotgun.
I've thought about the SLP loudmouth, but I've got a lot of money in my exhaust, and would prefer to just replace the muffler.
Does anybody have any thoughts?
Joined: Aug 2011
Posts: 1,261
Likes: 196
From: Jackson NJ
Car: 1984 T/A
Engine: LQ4
Transmission: T56
Axle/Gears: Ford 8.8 4.10 gears
Re: Loudest Muffler?
My friend has an 88 gta with a cammed 383 and the mufflex 4in system with a spintech muffler. The spintech comes in multiple sizes though. Significantly louder than my GMMG. It was deafening
Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Re: Loudest Muffler?
Yeah, but I'm looking to simply replace the muffler in the exhaust I have. Need a 3" inlet, dual 2 1/2" outlet muffler
Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Re: Loudest Muffler?
https://spintechmufflers.com/muffler...uration-chart/
Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Re: Loudest Muffler?
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Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Loudest Muffler?
If you don't have a better cam, 10.0 compression, better heads you can't get loud
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From: Tacoma, Wa
Car: '91 TA vert
Engine: turboLSx
Transmission: T56
Axle/Gears: 3.23
Supreme Member




Joined: May 2015
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From: Florida
Car: 1991 Z28
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3:42 Auburn
Re: Loudest Muffler?
I have the Aerochamber and when you open it up it is considerably louder than flow master. But at idle it is definitely quieter and more throuty. No drone with this. Hooker also makes a Max Air muffler but not sure if the make that version to fit our cars.
Joined: Mar 2014
Posts: 4,553
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Loudest Muffler?
Ive heard an Aerochamber on a Camaro and it was considerably louder than my 3in Flowmaster cat delete system on mine.. but the Camaro had a cammed LS engine so maybe that's why. Vinny in your video I thought the Hooker was loud also. I like the sound. Is it a straight through design or does the blackheart have baffles?
Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Re: Loudest Muffler?
From what I've been able to see so far, it looks like the Spintech Super Pro Street 9000 is the closest to my ideal. I'll keep looking.
Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Re: Loudest Muffler?
Spintech is a bust.
Just got off the phone with them. The only muffler they make to mount in the factory-style transverse location is the 3000SC Split Case
https://spintechmufflers.com/300sc-split-case/
The guy (Ron), who was not very helpful, said it would be quieter than the Flowmaster 40 I currently have.
Just got off the phone with them. The only muffler they make to mount in the factory-style transverse location is the 3000SC Split Case
https://spintechmufflers.com/300sc-split-case/
The guy (Ron), who was not very helpful, said it would be quieter than the Flowmaster 40 I currently have.
Last edited by seanof30306; Nov 14, 2019 at 07:36 PM.
Joined: Jun 2005
Posts: 334
Likes: 76
Car: 91 Formula
Engine: 5.0 tpi slow
Transmission: WC t-5
Thread Starter
Joined: Jan 2003
Posts: 1,613
Likes: 10
From: Tulsa, OK
Car: 1989 Formula WS6
Engine: L03 305 TBI
Transmission: T-5
Axle/Gears: 10 Bolt; 3.42 Posi
Re: Loudest Muffler?
Should work for ya
https://spintechmufflers.com/y-pipe-...uffler-delete/
https://spintechmufflers.com/y-pipe-...uffler-delete/
2slo, you may very well be a stable genius!
One of the things I've thought about is putting a single Dynomax Mini Race Bullet muffler into the intermediate pipe and having something like that fabricated. That makes it a lot easier, and cheaper!
https://www.summitracing.com/parts/wlk-24250/overview/
Last edited by seanof30306; Nov 15, 2019 at 12:27 AM.
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