No Spring Required.
Cam Style: Hydraulic roller follower
Basic Operating RPM Range: 750-6,200
Intake Duration at 050 inch Lift: 214
Exhaust Duration at 050 inch Lift: 231
Duration at 050 inch Lift: 214 int./231 exh.
Advertised Intake Duration: 253
Advertised Exhaust Duration: 274
Advertised Duration: 253 int./274 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.450 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.450 in.
Valve Lift with Factory Rocker Arm Ratio: 0.450 int./0.450 exh.
Lobe Separation (degrees): 115
Computer-Controlled Compatible: Yes
Grind Number: XE253LH-15
Valve Springs Required: No
Quantity: Sold as a pair.
Notes: Fits 3V SOHC engines only, works with stock tune.
COMP Cams XFI NSR Camshafts for Ford 4.6L/5.4L modular 3-valve engines are the first truly "drop-in installation" camshafts ever created for this popular application – striking the perfect balance of performance versus installation difficulty. An excellent alternative to the regular COMP Cams Xtreme Energy Ford Modular camshafts, these two staged cam sets require no computer re-tuning; however testing has shown that mild tuning can result in power gains even greater than the normal 25 rear wheel horsepower. These camshafts are fully compatible with the factory variable cam timing (VCT) system and are designed to operate in the stock rpm range.
