Reviewed By Douglas S (Bel Air, MD) Reviewed for a 2011 Chevy Silverado —9/1/2016 6:25 AM
Spacer was easy to install (about 20 minutes). I do notice a bit more pep when accelerating from a stop. I do not detect any "whistle" when accelerating. I'm still evaluating if my MPG's have increased. I almost did not purchase because I think the price is a little steep for a piece of machined aluminum.