BBC Nitrous Hyd. Roller Cam NX298HR

The BBC Nitrous Hyd. Roller Cam NX298HR from COMP CAMS is a high-performance hydraulic roller camshaft engineered for big-block Chevrolet engines built to handle sustained nitrous oxide boosting. Designed for enthusiasts and professionals who demand reliability under extreme load conditions, this roller cam delivers the valve lift and duration profile necessary for consistent power delivery across a wide RPM band. Whether you're building a competition engine or upgrading an existing platform, this camshaft provides the mechanical foundation for controlled, repeatable performance in nitrous-assisted applications.

This camshaft features a 298-degree intake duration and 310-degree exhaust duration with 0.566-inch intake and 0.575-inch exhaust lift, paired with a 113-degree lobe separation angle (LSA) that balances scavenging efficiency and cylinder-filling dynamics. The hydraulic roller design minimizes friction losses compared to traditional flat-tappet designs while the roller bearing eliminates cam lobe wear, extending component lifespan under high-load nitrous conditions. Operating range spans 2400 to 6500 RPM, providing usable torque at cruise while supporting peak horsepower at elevated engine speeds—critical for boosted applications where valve overlap and lift consistency directly affect turbo spool response and combustion chamber management.

Installation requires proper valve train verification, including compatible lifters, pushrods, rocker arms, and spring assemblies rated for the lift and duration profile specified. Technicians should confirm camshaft bearing clearances, timing chain condition, and fuel system tuning before startup to ensure the nitrous system synchronizes correctly with cam events. This camshaft is purpose-built for big-block Chevy platforms and delivers maximum effectiveness when paired with a complete high-flow induction and fuel delivery system tuned to the increased airflow these valve events create.