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 Joseph N (CLINTON, ME) Reviewed for a 2011 GMC Sierra —9/21/2016 8:17 PM
As far as I can tell, it does what it's meant to. I put this on before I put on my Spectre cold air intake to test it and noticed an immediate throttle difference, definitely added some power. And it hasn't messed with my mass air flow sensor. Don't buy this to save gas though, I haven't noticed much of a difference. Wasn't too hard to install either, just make sure you have a socket set and a pair of vice grips at least and you'll be fine.