Solid power gains above 4900 RPM, compatible with stock springs. Works with stock tune. Best with 3.73 gear & 2500 stall. Great idle.
XFI No Springs Required 222/235 Hydraulic Roller Finger Follower Cams for Ford 4.6/5.4L Modular 3V. Solid power gains above 4900 RPM, compatible with stock springs. Works with tuners, no computer re-tuning required. Best with 3.73 Gears and 2500 stall. Great idle.
