Manufacturer's Part Number:
Summit Racing Part Number:
Hydraulic roller tappet
Basic Operating RPM Range:
Intake Duration at 050 inch Lift:
Exhaust Duration at 050 inch Lift:
Duration at 050 inch Lift:
222 int./234 exh.
Advertised Intake Duration:
Advertised Exhaust Duration:
274 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
Exhaust Valve Lift with Factory Rocker Arm Ratio:
Valve Lift with Factory Rocker Arm Ratio:
0.572 int./0.529 exh.
Lobe Separation (degrees):
Valve Springs Required:
Designed to fit L83/L86 engines only, requires COMP Cams phaser limiter kit and PCM tuning.
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These revolutionary COMP Cams XFI AFM GM Gen V camshafts are designed to work with the direct-injection, VVT (variable valve timing), and AFM (active fuel management) lifters featured in GM's Gen V (LT1/L83/L86) V8 engine. They feature four different lobe profiles to both create AFM compatibility and optimize intake and exhaust valve opening/closing events. The camshafts increase torque and horsepower throughout the entire rpm range, while providing excellent responsiveness and midrange power over stock for across-the-board gains. The COMP Cams XFI AFM GM Gen V camshafts require the COMP Cams phaser limiter kit (sold separately), which limits the range of camshaft movement from 62 to 22 crank degrees, thus requiring PCM tuning.