Reviewed By Eyrik A (Signal Mountain, TN) —4/24/2015 8:35 PM
I love this muffler! I don't exactly have the loud sound I wanted but I think that's due to other things rather than the muffler itself. I could use a new cat converter and new exhaust manifolds to pair with it. Overall I'm rather pleased and love what this has done for my truck.
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!!!!