Reviewed By Ralph E K (Hagerstown, MD) Reviewed for a
—6/12/2013 6:53 PM
According to the first trip I made I picked up 4 mpg. Very impressed so far!!!
Reviewed By Robert R. D (Arvada, CO)
—4/11/2016 8:26 AM
Easy to install Very quiet at idle Increased hp. It changed the performance of the Denali