Reviewed By Kevin H (CONWAY, AR) Reviewed for a 1999 Ford F-150 —2/1/2014 9:53 AM
Amaizing can really feel the difference and I love the whistle
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.