Reviewed By Pete S (Taylorville, IL) Reviewed for a 2011 GMC Sierra —4/26/2017 9:53 AM
I installed this system on my 2011 GMC Sierra and it is fantastic. I have noticed an increase in fuel economy along with that signature Flowmaster performance.
Reviewed By Alan F (Kansas City, MO) Reviewed for a 2017 GMC Sierra —4/26/2017 7:50 AM
Love the sound and chrome tips. Installation instructions should address the driver's side pipe better. There is no mention of additional sockets/tools needed to install the hanger for the rubber mount. Having done this before on an '08 model, I had the tools. If not for that I would have had to make a trip for them. More difficult on the garage floor but can be done.
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