Reviewed By Everett R (YUKON, OK) Reviewed for a 2011 Ford F-150 —5/16/2017 10:42 AM
Easy install on 2013 F150 ecoboost and 2011 Mustang GT 5.0. Gained 2.3 mpg on F150 and 1.8 mpg on 5.0 first day.
Reviewed By Alejandro I (yuma, AZ) Reviewed for a 2009 Ford F-150 —3/15/2017 8:46 PM
I bought this spacer to improve hp and throttle response, i did notice a whistle sound from 2500 to 3000 rpm and also more hp when accelarating. It is not a huge improvement but i did notice a little more than stock.