SBC Hyd Roller Camshaft X4-260HR-11

The COMP CAMS SBC Hyd Roller Camshaft X4-260HR-11 is a hydraulic roller camshaft engineered for small block Chevy engines seeking increased horsepower and torque in the mid-to-high RPM range. This camshaft delivers 0.474-inch lift on both intake and exhaust valves with a 260/264-degree duration and 111-degree lobe separation angle, optimized for street and strip performance without requiring solid roller conversion complexity.

The X4-260HR-11 specifications translate directly to measurable performance gains. The 0.474-inch lift maximizes valve opening area for improved cylinder filling and exhaust scavenging, while the 260/264-degree duration profile keeps the powerband focused between 1,200 and 5,200 RPM—ideal for street driving and weekend track work. The 111 LSA (lobe separation angle) provides a balanced overlap curve that maintains reasonable idle quality while supporting aggressive top-end power. Hydraulic roller actuation eliminates the complexity of solid lifters and lash adjustment, reducing maintenance while delivering consistent valve train stability across varying engine temperatures and loads.

This camshaft is designed for small block Chevy builders upgrading from stock or mild-performance cam profiles who want responsive power without top-end peakiness. It pairs well with stock or mildly ported heads, standard intake manifolds, and carburetor or fuel-injection systems running modest boost levels. The X4-260HR-11 sits in COMP CAMS' Xtreme Energy series, positioning it as a proven mid-range option for enthusiasts balancing street drivability with genuine performance improvement. Installation requires compatible roller rocker arms and standard small block Chevy timing components.