COMP Cams CL51-433-11 Xtreme Energy Hydraulic Roller Cam and Lifter Kit for Pontiac - 236/242 265-455

The COMP Cams CL51-433-11 is an Xtreme Energy hydraulic roller camshaft and lifter kit engineered for Pontiac 265-455 V8 engines. Grind number XR288HR, this billet steel camshaft is designed for high-performance street and strip use, delivering a broad powerband with strong throttle response and impressive top-end horsepower.

COMP Cams' Xtreme Energy series uses aggressive lobe profiles that generate more area under the lift curve compared to conventional designs, while also maintaining increased engine vacuum for improved street drivability and power brake assist.

Camshaft Specifications:

• Grind Number: XR288HR
• Cam Type: Hydraulic Roller
• Camshaft Material: Billet Steel
• Duration at .050" Lift: 236° Intake / 242° Exhaust
• Advertised Duration: 288° Intake / 294° Exhaust
• Valve Lift (1.5:1 Rockers): .520" Intake / .540" Exhaust
• Valve Lift (1.65:1 Rockers): .571" Intake / .594" Exhaust
• Lobe Separation Angle: 110°
• Operating RPM Range: 2,200–6,000 RPM
• Camshaft Gear Attachment: 1-Bolt

Kit Includes:

• Hydraulic roller camshaft (XR288HR grind)
• Hydraulic roller lifters
• Assembly lubricant
• COMP Cams decals
• Installation instructions

Installation Notes: This cam profile produces a rough idle and is best paired with a 2,800+ RPM stall converter, lower rear gear ratios, and a minimum 9.5:1 compression ratio. Valve spring upgrade is required. Best performance is achieved with aftermarket intake manifolds and headers.