Flowmaster VS Dynomax mufflers
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Joined: Dec 2004
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From: New York
Car: 91 Firebird
Engine: 3.1 V6
Transmission: TH-700-R4
Flowmaster VS Dynomax mufflers
I currently have a dynomax catback and thinking of throwing on a flowmaster muffler? Anyone know the sound difference?
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Joined: Mar 2005
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From: Philadlephia PA
Car: 1992 Camaro RS
Engine: 3.1 V6
Transmission: Automatic
I've heard mixed reviews on the flowmasters. I have a dynomax on the car and it sounds great, I heard a 3.4 with a flowmaster and wasn't too impressed. It sounded hollow, like the throaty growl wanted to be there, but it just lacked. For the price I'd stay with the dynomax.
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Joined: Aug 2002
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
I will trade you my flowmaster + dual 2.5" outlets for your Dynomax muffler/tailpipe.
I freakin' HATE my flowmasters. If I get another 'man... nice v8! What you got done to it?' I'm going to FLIP OUT.
'Yeah man... I lopped off 2 cylinders, and 2.6 liters, and added exhaust/intake!'
*dumbfounded look*
BTW - I'm serious, I will freaking swap with you. I want a QUIET muffler!!
I freakin' HATE my flowmasters. If I get another 'man... nice v8! What you got done to it?' I'm going to FLIP OUT.
'Yeah man... I lopped off 2 cylinders, and 2.6 liters, and added exhaust/intake!'
*dumbfounded look*
BTW - I'm serious, I will freaking swap with you. I want a QUIET muffler!!
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Car: a car being parted out
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Originally posted by Doward
I will trade you my flowmaster + dual 2.5" outlets for your Dynomax muffler/tailpipe.
I freakin' HATE my flowmasters. If I get another 'man... nice v8! What you got done to it?' I'm going to FLIP OUT.
'Yeah man... I lopped off 2 cylinders, and 2.6 liters, and added exhaust/intake!'
*dumbfounded look*
BTW - I'm serious, I will freaking swap with you. I want a QUIET muffler!!
I will trade you my flowmaster + dual 2.5" outlets for your Dynomax muffler/tailpipe.
I freakin' HATE my flowmasters. If I get another 'man... nice v8! What you got done to it?' I'm going to FLIP OUT.
'Yeah man... I lopped off 2 cylinders, and 2.6 liters, and added exhaust/intake!'
*dumbfounded look*
BTW - I'm serious, I will freaking swap with you. I want a QUIET muffler!!
Mine was loud (40 series) and sounded mean at idle, but would get high and a little raspy.
Added a glass pack, and man... a toned down mustang sound that I LOVED!
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Flows are loud and burbly... Dynomax's don't sound as good on V8's, but sound much better on six's, IMO.
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Senior Member
Joined: Dec 2004
Posts: 909
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From: New York
Car: 91 Firebird
Engine: 3.1 V6
Transmission: TH-700-R4
The reason I asked was, I recently started working at pepboys partime. We stock flowmasters and I found the 80 series crossflow for the camaros/firebirds. I'd like it to be loud and throaty. My dynomax catback just does not do it for me anymore.
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Joined: Aug 2002
Posts: 3,827
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
Then swap with me 
Cheaper that way (just paying some shipping)
I've got to get rid of this thing!

Cheaper that way (just paying some shipping)
I've got to get rid of this thing!
I think its is pretty much factual to say that the more power you add to these V6's the crappier the flowmasters sound. Thats why I am changing mine very soon once my new setup arrives.
The flowmater when I first put it on the car sounded like crap, then I opted down on the two tailpipe diameter exits from dual 2.5" to dual 1.75" and it sounded great at all rpms especially the upper end. Now with the headers and 62mm TB it is starting to sound like crap again and I need to muffle it back down some more- nothing more I can do to tame the flowmaster80, time to move on and try something else to quiet the more power coming out.
Doward, you must really be hating life in the higher r's with the noise level if mine is getting bad at about 165hp
The flowmater when I first put it on the car sounded like crap, then I opted down on the two tailpipe diameter exits from dual 2.5" to dual 1.75" and it sounded great at all rpms especially the upper end. Now with the headers and 62mm TB it is starting to sound like crap again and I need to muffle it back down some more- nothing more I can do to tame the flowmaster80, time to move on and try something else to quiet the more power coming out.
Doward, you must really be hating life in the higher r's with the noise level if mine is getting bad at about 165hp
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From: southern maryland
Car: 2012 Ram express
Engine: 5.7 hemi
Transmission: auto
Axle/Gears: 3.55
If i add a new intake plenum, 65mm tb, and headers will my car sound meaner? More v8ish? I think my dynomax catback is ok its like a 4 banger fused with a v8 and formed the sound my car makes, low rpms v8ish, high rpms less v8ish kinda 4bangerish. I wish i could make it sounded more v8 like. I dont want a damn flowmaster muffler either caz they sound horrible in my opionion (at high rpms)
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From: New York
Car: 91 Firebird
Engine: 3.1 V6
Transmission: TH-700-R4
[QUOTE]Originally posted by 91greenbird
More v8ish? I think my dynomax catback is ok its like a 4 banger fused with a v8 and formed the sound my car makes
So like a v6 right?
More v8ish? I think my dynomax catback is ok its like a 4 banger fused with a v8 and formed the sound my car makes
So like a v6 right?
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