XFI™ VSR Modular 3V Camshafts

For those hardcore enthusiasts looking to achieve substantial horsepower and torque increases and who aren’t intimidated by having to upgrade their valve springs, COMP Cams® offers a full line-up of XFI™ VSR (Valve Springs Required) Cam Sets for Ford 4.6L/5.4L Modular 3 Valve Engines that offer as much as 40 hp increases over stock levels. Available for both naturally aspirated and supercharged engines, these cam sets are also available in two stages. Designed to work with the Ford variable cam timing (VCT) system, these camshaft sets are direct replacements that bolt in without engine modification except the valve spring upgrade. By working with the VCT, which is programmed to retard the camshaft timing at peak power, COMP Cams® XFI™ VSR Cam Sets for Ford 4.6L/5.4L Modular 3 Valve Engines optimize both mid-range and high rpm performance.

Application/Camshaft
Stage 1 - Excellent upgrade over stock. Solid power gains above 4400 rpm, requires spring upgrade. Tuner recommended. Stock gears & converter OK.
Stage 2 - Serious street cam, noticeable idle. Solid power gains above 4600 rpm, requires spring upgrade. Works with tuners, tuning recommended. Best with 3.90 gears & 3000 stall.
Blower Grind, Stage 1 - Powerful mid-rpm range cam for bolt-on blowers at stock boost levels. Solid power gains above 4400 rpm, requires spring upgrade. Stock gears & converter OK.
Blower Grind, Stage 2 Mid to upper range cam for bolt-on blowers with high boost. Noticeable idle, solid power gains above 4900 rpm, requires spring upgrade. Best with 3000+ stall.