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2001 GMC Sierra Performance Mufflers

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Latest Customer Reviews

Magnaflow XL Turbo Mufflers Reviews


Now my truck sounds like a truck

Reviewed By Robert O (Apple Valley, CA) Reviewed for a 2014 GMC Sierra —6/9/2017 1:07 AM

The only mufflers I buy are these... Mellow at Idle but you when you cut her lose these mags sound amazing, not like those beer can mufflers from Santa Rosa Ca

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Flowmaster Super 10 Series Mufflers Reviews


Not too shabby

Reviewed By Zackary A (BINGHAMTON, NY) Reviewed for a 2015 GMC Sierra —4/14/2017 8:19 PM

Too quiet with just the muffler . Had to cut out the resonator. Sounds pretty throaty now probably perfect for a lot of people .

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Flowmaster 70 Series Big Block II Mufflers Reviews


Flowmaster 70 series big block

Reviewed By Chad H (Lake Charles, LA) Reviewed for a 2013 GMC Sierra —3/29/2017 4:55 AM

Overall, I am happy with the muffler. As my daily driver and primary family vehicle used for traveling, I didn't want anything too loud. This muffler is a little louder than what I expected, comparing to a 50 series installed on same truck. I removed the 50 series last year and had to go back with the factory muffler due to a drone when pulling my trailer or boat. Using Flowmaster's sound chart, I thought the 70 series would be only choice as it looked to be the quietest muffler Flowmaster makes

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