Reviewed By WILLIAM J (CHESTERFIELD, VA) Reviewed for a 2014 GMC Sierra —6/10/2015 1:23 PM
Istalled in 10 min. Well worth the money! Also installed upgraded Mass Air Flow Sensor.
Reviewed By gary g (JACKSON, NJ) Reviewed for a 2013 GMC Sierra —6/14/2013 3:35 PM
Xtra Power without compromising gas mileage. 412 pony's ain't enough. Just be careful when you pass someone doing 30 or 40 mph, you better be up on the wheel. The only other change I made was afe dry air filter... Take your time on install, if i can do it anyone can. Follow directions for the after install. Idle should still be same. Can't say enough about AutoAnything, Best service, Best prices!!!!!!!! GT auto....