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2001 GMC Sierra Performance Mufflers

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Latest Customer Reviews

Magnaflow Performance Mufflers Reviews


Magnaflow muffler

Reviewed By Dawn D (COLLEGE POINT, NY) Reviewed for a 2013 GMC Sierra —7/21/2015 9:26 AM

So far so good. Purchased as a surprise for my husband delivery was quick, installation was easy done at a local muffler shop. He was quite surprised when I picked him up and had him drive she has just enough sound to take notice but not be overwhelmed.

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Flowmaster Super 50 Series SUV Mufflers Reviews


just right

Reviewed By Tim R (RADNOR, OH) Reviewed for a 2015 GMC Sierra —6/30/2015 5:52 AM

the 50 muffler is the right one for me and my sierra. it is just loud enough to let you know there is power under the hood, but it will not vibrate inside. unless you punch it, you would not notice it much. you can tell in normal driving it has more torque and horsepower.

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Flowmaster Street Performance Mufflers Reviews


Sounds great!!!!! 40 series

Reviewed By charles t (FOUR OAKS, NC) Reviewed for a 2014 GMC Sierra —4/15/2015 8:59 AM

Muffler sounds great when added with a k&n 77 air intake. Just remember new sierras and silverados, need to have the exhaust adaptive valve locked in full open position for full effect. Spring loaded valve damper inside pipe 6 inches after factory muffler. There to keep down sound when in v4. Does not effect performance of vehicle. Also remove the resonator. Worth the investment!!!!

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