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GMC S15 Pickup Performance Mufflers

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Latest Customer Reviews

Flowmaster 70 Series Big Block II Mufflers Reviews


Flow master 70 series

Reviewed By Jeffrey S (Warsaw, MO) Reviewed for a 2008 GMC Sierra —11/10/2016 3:22 AM

I purchased this muffler to replace a smaller flowmaster muffler that was too loud for my application. This has the performance of the flowmaster technology without all the noise.

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Flowmaster Super 50 Series SUV Mufflers Reviews


Cabin Sound

Reviewed By Glenn S (Waupaca, WI) Reviewed for a 2015 GMC Acadia —5/19/2016 8:20 AM

I like my Flowmaster 50 series muffler but i wish I would have gotten a 70 series Flowmaster for less noise, I do not mind a little noise in back of the car but cabin noise bugs me, as they say after the fact. It would be nice if there was a return policy if we the customer was not happy and was going to exchange for a similar product.

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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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