XFIª Spring & Phaser Mods Required 237/244 Hydraulic Roller Finger Follower Cams for Ford 4.6/5.4L Modular 3V. Max effort street/strip cam with very rough idle, needs ported heads. Good mid-range with incredible power up to 7000+ RPM. Solid power gains above 4900 RPM, requires spring & phaser upgrade. Custom tuning required. 4.10+ gears and 3200+ stall.
XFI SPR 237/244 Hydraulic Roller Cams for Ford 4.6/5.4L Modular 3 Valve
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