Reviewed By Scott M (Springfield, IL) Reviewed for a 2010 GMC Sierra —12/13/2014 4:26 PM
Reviewed By Harry B (Cupertino, CA) Reviewed for a 2010 GMC Sierra —8/28/2014 12:42 PM
I just installed it today. Already noticed increase in hp and waiting for increase in mpg. Straight-forward to install. Easy to lay out. Directions were very clear and well done.