Description
The Xtreme Energy XFI Series is designed for use with modern induction systems, heads, springs and rockers. The XFI intake lobes have more lift than the base Xtreme series, and the XFI exhaust lobes have more area under the curve, for better exhaust flow, than the base exhaust series. These are the first hydraulic roller and hydraulic flat tappet profiles designed for use with COMP Cams Beehive Valve Springs, such as the #26915, #26918 and #26120. The combination of these profiles, the Beehive Springs, and our Ultra Pro Magnum Rocker Arms in higher ratios, makes for the most revolutionary improvement in hydraulic flat tappet design to date by bringing the latest race winning technology to the street.