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 and phaser upgrade. Requires custom tuning. Stock gears and converter ok.
XFI Spring and Phaser Mods Required 221/228 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 and phaser upgrade. Custom tuning required. Stock Gears and converter OK.
