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GMC Sierra Gas Saving Products

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Latest Customer Reviews

Flowmaster Exhaust Systems Reviews


Looks good and sounds good

Reviewed By Mark H (MAIDEN, NC) Reviewed for a 2013 GMC Sierra —6/24/2017 6:20 PM

Really like the sound. Gives my wife's v6 camaro a more aggressive sound. Looks real good too. Tight area to use a saws all. If I had a lift I could have gotten better access. Used a six inch blade and no guard. Just able to get through the pipe. Only complaint were the tips. I had an issue I had on my exhaust. Bolts for tips are too whimpy. They will cross thread by the time you get the tip secure. I changed the bolt to a larger one. No issue after that. Over all love it.

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Magnaflow Exhaust Systems Reviews


Better Now

Reviewed By Philip B (COLUMBIA, TN) Reviewed for a 2017 GMC Sierra —6/1/2017 5:54 AM

The Magnaflow exits more to the side and the polished 6" tip looks much better than stock. Gets rid of the factory 3" diffuser and unattractive shroud. Lower EGT keeps the PCM from reducing power on long hills pulling 15K load.

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