(STAGE 1) Blower XFI™ SPR, XE264PH-13 Powerful w/ Great Idle, Excellent Upgrade Over Stock
XFI Spring & Phaser Mods Required Blower 229/240 Hydraulic Roller Finger Follower Cams for Ford 4.6/5.4L Modular 3V. Powerful cam with great idle, excellent upgrade over stock. Good torque down low with powerful mid-range. Solid power gains above 4500 RPM, requires spring & phaser upgrade. Custom tuning required. OK with stock gears.