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2013 GMC Sierra Performance Mufflers

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Latest Customer Reviews

Magnaflow Performance Mufflers Reviews


Very good product

Reviewed By dalton w (COAL TOWNSHIP, PA) Reviewed for a 2013 GMC Sierra —11/4/2015 5:56 AM

I installed the 14" magnaflow performance muffler on my sierra. It sounds excellent, not to loud and not to quiet. Just has that perfect tone that a truck should sound like.

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Flowmaster 50 Series Delta Flow Mufflers Reviews


Flowmaster 50 series

Reviewed By Chad H (Lake Charles, LA) Reviewed for a 2013 GMC Sierra —4/24/2014 9:14 AM

Too loud for my taste. I bought the 50 series so that I would have little interior noise, I am disappointed with that aspect and also the exterior noise level. Pulling a trailer in two mode, I now have a irritating resonance. Will most likely go back with my OEM.

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Flowmaster Super 40 Series Mufflers Reviews


Great sound and gas mileage

Reviewed By Andrew V (EAST WINDSOR, CT) Reviewed for a 2013 GMC Sierra —10/11/2013 8:04 AM

Shipped very fast i literally got an email saying it was shipped and a txtfrom my wife that it was delivered at nearly the same time. Noticeable better gas mileage i had the same muffler on my last gmc truck and will continue to use super 40 mufflers

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