COMP Cams 51-221-4 Xtreme Energy 212/218 Hydraulic Flat Cam for Pontiac 265-455

Delivers strong torque through the low and mid-range with a good idle, the COMP Cams Xtreme Energy hydraulic flat tappet cam, part 51-221-4, is engineered for Pontiac 265-455 8-cylinder engines (1955-1981). This street and performance cam produces 0.447 in intake valve lift and 0.455 in exhaust valve lift with 212-degree intake duration and 218-degree exhaust duration at 0.050 inch lift. The 110-degree lobe separation angle and cast-iron construction deliver balanced, reliable power.

• Camshaft Series: Xtreme Energy
• Usage: Street/Performance
• Cam Type: Hydraulic Flat Tappet
• Grind Number: XE256H
• Basic Operating RPM Range: 1,000-5,200 RPM
• Intake Duration at .050 Inch Lift: 212 deg
• Exhaust Duration at .050 inch Lift: 218 deg
• Advertised Intake Duration: 256 deg
• Advertised Exhaust Duration: 268 deg
• Lobe Separation: 110 deg
• Intake Valve Lift: 0.447 in
• Exhaust Valve Lift: 0.455 in
• Lifters Included: No
• Valve Springs Required: Yes
• Assembly Lubricant Included: Yes
• Camshaft Gear Attachment: 1-Bolt
• Camshaft Material: Cast Iron
• Cam and Lifter Kit Upgrade: CL51-221-4
• K-Kit Upgrade: K51-221-4
• Lifter Type: Hydraulic Flat Tappet
• SK-Kit Upgrade: SK51-221-4
• Engine Family: Pontiac 265-455 C.I. 8 Cylinder (1955-1981)
• C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.
• C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.