Comp Cams 127600 4.6L / 5.4L 3V XFI SPR Stage 3 N/A Camshafts

The Comp Cams XFI SPR Stage 3 N/A camshafts are designed for maximum N/A power. Upgraded Intake Manifold and Ported Cylinder Heads highly suggested. Upgraded Rods and Pistons also suggested due to operating RPM. Shift points will be around 7000 - 7200 RPM. These Camshafts do require upgraded valve springs and Phaser limiters. Suggested 4.10 - 4.30 gears and 3200 - 3600 stall. Custom tuning required. Very rough idle.