Reviewed By Christopher M (DIANA, TX) Reviewed for a 2012 Ford F-250 —9/27/2013 5:43 AM
I installed the aFe Magnumflow ProGuard 7 on my otherwise stock 2012 6.7 Powerstroke. Power increased as promised. Fuel economy increased on the highway, but is worse in town now, assumedly from the increase in power. 18.5 in town 20-22 cruising the highway.