BBC Gen VI Xtreme Hyd. Roller Cam XR264HR-10

The BBC Gen VI Xtreme Hyd. Roller Cam XR264HR-10 is a high-performance hydraulic roller camshaft engineered for big block Chevrolet engines seeking aggressive street and strip performance. Manufactured by COMP Cams—a leader in aftermarket cam design—this camshaft is purpose-built for enthusiasts who demand reliable power delivery across a broad RPM band. Hydraulic roller cams eliminate the wear and maintenance concerns of solid roller designs while delivering consistent valve actuation and superior durability in demand-intensive applications.

This Xtreme Energy profile features a 264-degree intake duration and 270-degree exhaust duration with a 110-degree lobe separation angle (LSA), creating an asymmetrical valve timing strategy that optimizes low-end torque response while maintaining midrange and top-end power potential. The intake and exhaust lift specifications of 0.510 inches each ensure aggressive valve opening without requiring extensive cylinder head porting. The 1200–5200 RPM power band makes this cam ideal for street applications where throttle response and part-throttle performance matter, while still supporting higher-RPM capabilities for weekend track use. The Gen VI design incorporates Chevrolet's modern big block architecture, ensuring proper valve clearance and OEM compatibility.

This camshaft is best suited for big block Chevrolet builds—BBC 427, 454, and similar displacement engines—whether running stock or modified cylinder heads. Installation requires proper valve lash adjustment, pushrods checked for length, and rocker arm geometry verification to ensure optimal performance and prevent valve train damage. The hydraulic roller design self-adjusts for clearance, reducing setup complexity compared to solid cam alternatives. Buyers should confirm their engine's specific architecture and consult installation guides to validate compatibility with existing valve train components and intake manifold fitment.