SBC Xtreme TK C/T Solid Roller Cam CS283TK-R6

The COMP CAMS SBC Xtreme TK C/T Solid Roller Cam (model 12-857-9) is a mechanical roller camshaft engineered for small-block Chevy oval track engines operating in the 3,500–7,500 RPM power band. This high-lift, long-duration profile delivers the aggressive valve timing required for sustained competition performance, where precision cam selection directly impacts power output and engine response in racing environments.

Specification breakdown: 0.645-inch lift on both intake and exhaust, 283-degree intake duration and 287-degree exhaust duration, and a 106-degree lobe separation angle (LSA) create an aggressive overlap window that maximizes scavenging and cylinder filling at mid-range RPM. The solid roller design eliminates valve train compliance, ensuring tight control of valve events without deflection—a critical requirement for repeatability in competitive oval track applications where engine tune consistency lap-to-lap determines race outcomes. This camshaft is calibrated for mechanical lifters, not hydraulic compensators.

Oval track racers, whether running short-track dirt or paved circuits, rely on COMP CAMS' engineering to build power in the RPM range where competition happens. The Xtreme TK series targets naturally aspirated small-block Chevy engines where mid-range torque and peak horsepower alignment are non-negotiable. Installation requires proper valve train geometry verification, push-rod length confirmation, and experienced machine work to ensure correct installed height and rocker arm geometry.

COMP CAMS holds significant market authority in racing and performance cam manufacture, with decades of competition feedback embedded in their profile designs. The small-block Chevy platform remains the dominant power plant in grassroots and regional oval track racing, making cam selection a core performance decision for any team building or refreshing race engine packages.