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GMC Performance Mufflers

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Latest Customer Reviews

Flowmaster 50 Series Delta Flow Mufflers Reviews


Nice sound

Reviewed By Mark M (KATY, TX) Reviewed for a 2001 GMC Sonoma —10/10/2018 1:02 AM

Was worried that it would be to loud but gives a nice mild sound to my little 2.2L motor. Seem to run smoother on open road with less up shift. Used stock pipes 2.25" in and 2.25" out

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Flowmaster Super 10 Series Mufflers Reviews


Love it

Reviewed By Bill E (HARRISON, TN) Reviewed for a 2001 GMC Yukon —9/29/2018 5:18 AM

The super 10 sounds great, loud but not too loud. Went from a Super 44 to a Super 10 and don't regret it one bit, if you're on the fence, get it.

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Flowmaster Original 40 Series Mufflers Reviews


2016 GMC Sierra

Reviewed By Chris N (Las Cruces, NM) Reviewed for a 2016 GMC Sierra —6/13/2018 7:53 AM

I installed this by removing everything from the stock muffler back. Installed the series 40 exactly where the original muffler was and had exit pipe turn out just in front of the rear tire. Unless you were in the throttle really hard, you couldnt tell if it was a V8 or the V6.

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