(STAGE 2) XFI™ VSR, XE261H-15.5<BR>Serious Street, Noticeable Idle
XFI Valve Springs Required 222/235 SOHC Hydraulic Roller Finger Follower Cams for Ford 4.6/5.4L Modular 3V. Serious street cam, noticeable idle. Solid power gains above 4600 RPM, requires spring upgrade. Works with tuners tuning recommended. Best with 3.90 gears & 3300 stall.