BBC Hydraulic Roller Cam 304HR

The COMP Cams BBC Hydraulic Roller Cam 304HR (part number 11-460-8) is a purpose-built camshaft engineered for Big Block Chevy applications requiring balanced mid-range torque and reliable hydraulic roller actuation. This camshaft delivers 0.612-inch lift on both intake and exhaust with a 304-degree duration specification across a 110-degree lobe separation angle, optimizing performance in engines targeting the 3000–6500 RPM operating band.

The 304-degree duration and symmetric valve lift profile establish this as a mild hydraulic roller grind suitable for street and light performance use. Hydraulic roller technology minimizes valvetrain friction compared to flat-tappet designs while providing superior durability under sustained RPM cycling. The 110 LSA (lobe separation angle) centers the intake and exhaust events symmetrically, promoting stable idle characteristics and predictable throttle response—critical considerations for drivers prioritizing streetability without sacrificing usable torque. The modest RPM range (3000–6500) indicates this cam favors low-to-mid RPM power delivery rather than extreme redline extension.

Big Block Chevy owners restoring or upgrading engines for improved part-throttle performance, cruise comfort, and reliability benefit most from this specification. The BBC Hydraulic Roller Cam 304HR works within stock or moderately ported cylinder head packages and is compatible with standard hydraulic roller lifter systems. Proper valve adjustment, pushrod geometry verification, and lifter preload confirmation are essential during installation to ensure optimal valve timing and longevity.

COMP Cams maintains a strong reputation for precision camshaft grinding and quality control in the hot rod and performance rebuilding sector. This 304HR profile represents a conservative yet effective choice for builders seeking reliable, long-stroke torque without the complexity of adjustable cam gears or extreme lift figures that demand expensive cylinder head modifications.