SBC Magnum Hyd. Roller Cam 304H-R10

The SBC Magnum Hyd. Roller Cam 304H-R10 from COMP CAMS is a hydraulic roller camshaft engineered for small-block Chevy engines seeking reliable mid-range performance and durability. This camshaft is designed for builders and enthusiasts who demand consistent valve control without the complexity of solid roller setups, making it an ideal choice for street-driven vehicles, mild performance builds, and weekend cruisers that require proven reliability over extreme horsepower chasing.

Built with a 304-degree duration on both intake and exhaust, paired with 0.600-inch lift per valve, this hydraulic roller design delivers smooth, predictable power delivery across a 3000–6500 RPM powerband. The 110-degree lobe separation angle (LSA) creates a balanced profile that optimizes low-end torque and mid-range responsiveness without sacrificing streetability. Hydraulic rollers eliminate the need for manual valve lash adjustment and reduce wear on valve train components, while the roller design itself cuts friction at the lifter-lobe interface—resulting in better efficiency, cooler operating temperatures, and extended service life compared to flat-tappet alternatives.

This cam excels in small-block Chevy platforms—including 350, 383, and other displacement variants—and pairs seamlessly with factory or aftermarket hydraulic roller lifters and standard valve train geometry. Installation requires basic engine machine work and compatibility verification with your existing cylinder heads, intake manifold, and valve cover clearances. Mechanics and engine builders trust COMP CAMS roller cams for consistent performance in street and strip applications where reliability and ease of tuning matter as much as power.