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1999 GMC Sierra Performance Mufflers

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Latest Customer Reviews

Flowmaster Super 44 Series Mufflers Reviews


Beautiful Sound

Reviewed By Rafael M (Melrose Park, IL) Reviewed for a 1999 GMC Sierra —7/3/2012 10:02 PM

Good quality muffler. Loud but not loud enough to get pulled over. Love the sound once I reach 2,000 rpm.

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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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