BBC Xtreme Roller Cam XR280R-10

The Comp Cams BBC Xtreme Roller Cam XR280R-10 is a high-lift mechanical roller camshaft engineered for big-block Chevy engines seeking aggressive mid-range and peak-RPM power delivery. This Xtreme Energy profile delivers 0.646-inch intake and 0.653-inch exhaust valve lift across a 280/286-degree duration window, establishing the foundation for serious street and strip performance in applications where mechanical roller reliability and lift capacity are non-negotiable.

The 110-degree lobe separation angle (LSA) positions this camshaft in the overlap range favored by solid-lifter big-block builds, optimizing combustion events for engines running in the 2500 to 6500 RPM band. Mechanical roller followers eliminate hydraulic lag and float concerns, permitting the aggressive ramp rates required to move 0.650-plus inches of valve lift without compromise. The extended 286-degree exhaust duration particularly benefits headers and tuned intake manifolds, maximizing scavenging efficiency when paired with appropriate fuel delivery and ignition tuning.

Big-block Chevy muscle car restorers, bracket racers, and engine builders pursuing maximized naturally-aspirated output select this cam when factory or mild-performance profiles fall short of their power targets. The mechanical roller design demands solid lifters and valvetrain geometry verification—block decking, piston-to-valve clearance, and rocker arm geometry must be confirmed before installation. Builders pairing this XR280R-10 with compatible induction, fuel system, and ignition modifications achieve predictable, repeatable gains in mid-range torque and peak horsepower within the intended RPM window.