Reviewed By Charmaine N (LOGAN, UT) Reviewed for a 2015 GMC Sierra —10/7/2015 10:51 PM
I love my Super 44 series Flowmaster muffler for my '15 GMC Sierra!! Sounds great! Awesome throaty tone! Big savings compared to else where!
Reviewed By Erik R (SEFFNER, FL) Reviewed for a 2014 GMC Sierra —10/1/2015 4:20 PM
This took roughly an hour for installation and was pretty easy. A big change in both exhaust note and throttle response. The truck roars to life now, but maintains a gentle purr at idle and cruising. Combined with the Airaid CAI this dynamic duo lowered RPMs, increased MPGs (avg +1 MPG so far), and seriously increased driving excitement.