Xtreme Hyd. Roller Cam - SBC X4 260HR-11

The COMP CAMS Xtreme Hydraulic Roller Cam SBC X4 260HR-11 is a purpose-built hydraulic roller camshaft engineered for small block Chevy engines demanding reliable high-RPM performance. This camshaft delivers 0.474 inches of lift on both intake and exhaust, with a 260-degree intake duration and 264-degree exhaust duration ground on a 111-degree lobe separation angle—a proven profile for street and strip applications that balances power across a broad 1200–5200 RPM operating band.

Hydraulic roller design eliminates the wear patterns associated with flat-tappet cams, offering superior longevity and consistent valve timing throughout the engine's service life. The 111 LSA centering provides a mid-range focus ideal for engines that require responsive throttle characteristics without sacrificing low-end torque. The lift and duration values work together to optimize valve overlap and scavenging efficiency—critical factors when targeting consistent power in naturally aspirated small block builds. This camshaft integrates directly with standard small block Chevy valve train components, requiring only a compatible timing set and proper valve clearance setup.

Builders and engine shops specify COMP CAMS roller cams for applications where durability and predictable performance are non-negotiable—weekend warrior builds, vintage restorations, and street engines that see frequent use. The 260/264 profile suits engines with moderate compression ratios and stock-to-slightly-upgraded induction, making it a practical choice for users seeking noticeable performance gains without requiring full top-end overhauls or exotic fuel requirements.

Each camshaft ships as a single unit. Proper installation requires inspection of lifter bores, verification of pushrod geometry, and adherence to the manufacturer's break-in procedures to ensure optimal valve train stability and longevity.