XFI™ SPR Modular 3V Camshafts

The COMP Cams® XFI™ SPR (Springs and Phaser Mods Required) Camshafts are the best way to achieve the most horsepower and torque increases possible with the popular Ford 4.6L/5.4L Modular 3 Valve engines. This last group of cam sets is available for both naturally aspirated and supercharged engines, and each version is offered in three performance levels. Designed to work with a modified Ford variable cam timing (VCT) system, these camshafts are direct replacement components. Working with the required COMP Cams® Cam Phaser Limiter Kit (Part #5449; patent pending), these XFI™ SPR Cams optimize both low and high rpm performance. As noted by the COMP Cams® engineering staff during extensive dyno testing, these camshafts provided the biggest power and torque improvements of any cam series they’ve ever tested in the Ford Modular 3 Valve engine.

Application/Camshaft
Stage 1 - 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. Stock gears & converter OK.
Stage 2 - Powerful cam with very rough idle, biggest cam to use with stock heads. Good mid-range torque with incredible top end hp gains. Solid power above 4700 rpm, spring & phaser upgrade required. 3.90 or better gears & 3000+ stall.
Stage 3 - 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 & 3200+ stall.
Blower Grind, Stage 1 - 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.
Blower Grind, Stage 2 - Big power gains in mid to upper-rpm range for bolt-on blowers with high boost. Rough idle, solid power gains above 4900 rpm, requires spring & phaser upgrade. Custom tuning required. Best with 3.90+ gears & 3000+ stall.
Blower Grind, Stage 3 - Max effort blower cam with very rough idle, needs ported heads. Great mid-range power with incredible gains up to 7000+ rpm. Solid power gains above 4900 rpm, requires spring & phaser upgrade. Custom tuning required. 4.10+ gears & 3200+ stall.