Reviewed By John Y (WARWICK, NY) Reviewed for a 2014 GMC Sierra —5/4/2017 9:28 AM
It arrived quickly, was easy to install and fit like a glove! I am so impressed by the great sound and horsepower gain.
Reviewed By thomas f (BOONESMILL, VA) Reviewed for a 2005 GMC Sierra —3/17/2016 4:26 AM
Simple install, has that typical whistle between 2,500 and 4,000 rpm. Note: didn't whistle at 1st but did after I seafoamed my truck to improve performance. Definitely pulls hills better. No need for the expensive metal ones.