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Pontiac Firebird Performance Mufflers

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Latest Customer Reviews

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 50 Series Delta Flow Mufflers Reviews


Exactly what I expected

Reviewed By David V (MANLIUS, NY) Reviewed for a 2000 Jeep Grand Cherokee —4/17/2018 2:37 AM

Flowmaster mufflers have always been quality, but most often more than I wanted to spend. When I finally bit the bullet and bought one, it exceeded my expectations. It has a nice deep rumble that is not overly loud or offensive but about as loud as I want it to be. Sounds perfect for my straight 6 cylinder jeep.

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Flowmaster Street Performance Mufflers Reviews


Best on the market

Reviewed By Lawrence B (SALUDA, VA) Reviewed for a 2003 Toyota Tundra —3/16/2018 6:11 AM

I owned 4 of them, put them on all my trucks and cars, love the sound and performance.

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Year Range For Pontiac Firebird Performance Mufflers