Xtreme Solid Cam - SBC XS268S

The COMP Cams Xtreme Solid Cam SBC XS268S (part number 12-676-4) is a mechanical flat tappet camshaft engineered for small block Chevrolet engines seeking aggressive mid-range to peak power output. This camshaft delivers 0.488-inch intake and 0.501-inch exhaust lift across a 268/274-degree duration profile, optimized for naturally aspirated street and strip applications operating between 1600 and 6000 RPM.

The 110-degree lobe separation angle provides the mechanical and thermal characteristics required for consistent valve event timing without hydraulic dampening. Lift and duration specifications are calibrated to maximize intake manifold filling and scavenging efficiency in the 3000–5500 RPM power band, a critical range for street engines and weekend track use. The mechanical flat tappet design eliminates complexity and cost while maintaining precise valve control. Proper valve train geometry and spring pressure tuning are essential when installing this camshaft to ensure durability and prevent float or lobe wear.

This cam is suited for builders and enthusiasts restoring or modifying small block Chevy engines for street performance, bracket racing, or classic car applications. Intake and exhaust manifold selection, carburetor sizing, and ignition curve optimization become critical variables when pairing this profile with supporting components. COMP Cams' Xtreme Energy line is recognized in the performance engine community for delivering aggressive profiles at accessible price points, making this a cost-effective choice for budget-conscious engine builders.