SBC Nitrous Hyd. Roller Cam NX276HR-13

The COMP Cams SBC Nitrous Hydraulic Roller Cam NX276HR-13 is a purpose-built camshaft engineered for small-block Chevrolet engines running nitrous oxide injection systems. This hydraulic roller cam delivers 0.502-inch intake and 0.520-inch exhaust lift across a 276/288-degree duration window at 113 degrees LSA, optimized for peak nitrous-assisted performance in the 2000–6000 RPM band. The hydraulic roller design eliminates pushrods noise while maintaining precise valve actuation under high boost conditions typical of nitrous applications.

The asymmetrical lift profile—higher exhaust lift than intake—is specifically calibrated for nitrous systems where exhaust scavenging efficiency becomes critical to prevent detonation and manage cylinder pressures. The 113 LSA (lobe separation angle) provides the overlap characteristics necessary for controlled NOS burn at high RPM, reducing the risk of uncontrolled detonation that can damage stock or modified short-blocks. Hydraulic roller followers ensure repeatability across the RPM range, eliminating valvetrain wear that plagues mechanical designs in high-oxygen, high-temperature nitrous environments.

This camshaft is ideal for street or bracket racers running small-block Chevrolet power plants with nitrous injection kits. Whether you're tuning a bracket-race entry or street engine seeking controlled boost without radical idle characteristics, the NX276HR-13 bridges the gap between aggressive power delivery and drivability. The design accommodates both stock and aftermarket induction systems, making it a versatile choice for builders who need a nitrous-specific grind without unnecessary complexity.