COMP Cams K51-423-11 Xtreme Energy Hydraulic Roller Camshaft K-Kit for Pontiac - 224/230 265-455

The COMP Cams K51-423-11 Xtreme Energy 224/230 Hydraulic Roller K-Kit is a complete camshaft upgrade solution engineered for Pontiac 265–455 cubic inch engines. The Xtreme Energy hydraulic roller cam series is designed to deliver a noticeable improvement in throttle response, torque, and horsepower across the RPM range while maintaining streetable manners and excellent vacuum for power brake and emissions compatibility.

This hydraulic roller profile features 224/230 degrees of advertised duration, providing an aggressive cam profile that builds strong mid-range and top-end power without sacrificing drivability. The roller lifter design reduces valvetrain friction compared to flat tappet designs, resulting in improved efficiency and longer component life.

Kit Contents:

• Xtreme Energy hydraulic roller camshaft (224/230 advertised duration)
• Hydraulic roller lifters
• Valve springs matched to the cam profile
• Valve spring retainers
• Valve locks (keepers)
• Valve stem seals
• Timing chain set
• Decals and installation instructions

Key Features:

• Hydraulic roller design for reduced friction and improved longevity
• Complete K-Kit — all critical valvetrain components included for a full installation
• Engineered specifically for Pontiac 265–455 V8 engines
• Xtreme Energy grind delivers strong street and strip performance
• Matched component set eliminates guesswork when sourcing individual parts
• COMP Cams' industry-leading quality and engineering

The COMP Cams K-Kit format ensures every critical valvetrain component is matched and ready to install together, making it an ideal choice for engine builders seeking a reliable, performance-focused upgrade for classic Pontiac V8 applications.