BBC Xtreme Hyd. Roller Cam XR288HR

The BBC Xtreme Hydraulic Roller Cam XR288HR from COMP CAMS is purpose-built for serious big-block Chevrolet engine builders seeking aggressive yet streetable performance. This hydraulic roller camshaft delivers the valve lift and duration needed for high-RPM breathing while maintaining the reliability advantages of hydraulic actuation. Whether you're building a restomod, road-race platform, or big-inch stroker, the XR288HR fills the gap between mild street cams and extreme solid-roller designs.

Hydraulic roller technology eliminates the complexity and maintenance demands of solid-roller setups while improving valve train stability and component longevity. COMP CAMS engineers the XR288HR with precision-ground lobes that optimize valve overlap, intake velocity, and scavenging efficiency across the RPM band. The roller followers reduce friction losses compared to flat-tappet designs, translating to measurable horsepower gains and improved fuel economy at part throttle. Tight manufacturing tolerances ensure consistent performance across cylinders, critical when chasing repeatable dyno numbers or track times.

Installation requires proper pushrod geometry, rocker arm selection, and valve spring rate verification—common considerations any experienced BBC builder already manages. The XR288HR works across the full spectrum of big-block platforms (BBC 366, 396, 402, 427, 454, and 502 displacements) with factory or aftermarket cylinder heads and intake manifolds. Hydraulic roller cams like this one suit builders who prioritize ease of tuning, parts availability, and cold-start reliability without sacrificing aggressive cam profiles or peak power potential.