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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 Super 50 Series SUV Mufflers Reviews

great sound

Reviewed By THOMAS H (CLARKSVILLE, TN) Reviewed for a 2004 GMC Envoy —9/25/2009 10:21 AM

this flowmaster sound great and the sound is not that loud/perfect just the right tone.

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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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