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GMC Envoy Performance Mufflers

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Latest Customer Reviews

Flowmaster 40 Series Delta Flow Mufflers Reviews


Just what I expected !!!!

Reviewed By john b (potomac, IL) Reviewed for a 2005 GMC Envoy —3/31/2016 11:37 AM

It brings the 5.3 alive sound wise and gas mileage has improved alittle bit

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Flowmaster 70 Series Big Block II Mufflers Reviews


Flowmaster 70 for Toyota Tundra 2007

Reviewed By David P (Galveston, TX) Reviewed for a 2007 GMC Envoy —1/23/2008 2:08 PM

Great sound with little to no resonance inside cab. Had a muffler included with the JBA exhaust system and it was junk. Stainless steel, but just a big glass pack. The resonance inside cab was horrible. The 70 series sounds good on the outside without the resonance inside the cab.

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Flowmaster Super 44 Series Mufflers Reviews


What Did You Say?!

Reviewed By Joseph N (CLINTON, ME) Reviewed for a 2011 GMC Sierra —9/21/2016 8:13 PM

My ears are bleeding.... I love it. For real though, it's a little louder in the cab than I wanted, but I'm glad I didn't go with the Super 10. Good price, gotta love AutoAnything. Had it welded, only way you should do it really, and appearance I could care less about because no one is going to be looker underneath my truck.

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