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Pontiac Firebird Performance Mufflers

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Latest Customer Reviews

Flowmaster Original 40 Series Mufflers Reviews


40 Series

Reviewed By Ian M (Sedgwick, KS) Reviewed for a 1999 Pontiac Firebird —7/10/2011 3:32 AM

Love the sound of my 40 series. I put it on my 99 Trans Am. Sounds great and turns heads. Love it.

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Flowmaster 40 Series Delta Flow Mufflers Reviews


Flowmaster 40 series Delta Flow

Reviewed By John Y (Novi, MI) Reviewed for a 1968 Pontiac Firebird —8/15/2007 10:14 AM

These mufflers sound good outside of the car. They give the car a nice growl. I have a 1968 Firebird with a 400 engine. A little more resonance inside of the car than I expected. I am running 2 1/2" exhaust.

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Flowmaster Super 10 Series Mufflers Reviews


Loud and proud

Reviewed By Cody M (FAIRHOPE, AL) Reviewed for a 2005 Chevy Silverado —7/25/2016 9:47 PM

Not quite as powerful as straights, but way ahead of the other flowmaster models. I have the 3" in and dual 2.5" out and the sound is awesome. I have 12" turndowns right where the bed meets the cab so that causes plenty of cabin drone. Overall great sound from outside. Going from stock to this even added enough hp that i can spin my 35x12.50s on dry pavement. Something i couldnt do before!

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