Reviewed By ken h (CLOVERDALE, IN) Reviewed for a 2013 GMC Sierra —11/18/2017 10:33 AM
Super fast shipping, took an hour to install, works great with the 3" exhaust, really livened up the 5.3
Reviewed By Hal C (COLLINSVILLE, OK) Reviewed for a 2014 GMC Sierra —11/17/2017 4:03 PM
Not enough time to prove mileage gains but no question the improved sound when I step on the gas. The installation was clear and easy to perform. Response does have an improved feel and definitely no buyers remorse.