BBC Gen VI Xtreme Hyd. Roller Cam XR300HR-10

The COMP CAMS BBC Gen VI Xtreme Hydraulic Roller Cam XR300HR-10 is a high-lift hydraulic roller camshaft engineered for big block Chevrolet engines seeking aggressive naturally aspirated performance. This camshaft delivers 0.560-inch intake and 0.580-inch exhaust lift with a 300/306-degree duration split and 110-degree lobe separation angle, creating a power band optimized between 3,000 and 6,400 RPM where torque and horsepower demand maximum valve event precision.

Built specifically for Generation VI big block Chevy platforms, this Xtreme Energy profile uses hydraulic roller technology to eliminate valve train friction while maintaining the durability required for sustained high-RPM operation. The asymmetrical intake-to-exhaust lift curve (0.560 to 0.580 inches) prioritizes exhaust scavenging efficiency at peak power, a characteristic that distinguishes aggressive street and light competition cam profiles from mild street grinds. Hydraulic roller lifters automatically adjust for thermal expansion, reducing the complexity of manual valve lash adjustment while extending component lifespan under varying load conditions.

This camshaft addresses builders who demand higher valve lift and duration than factory profiles but require reliable operation across real-world engine speeds. The 110-degree LSA (lobe separation angle) positions intake and exhaust events to maximize cylinder charge and scavenging overlap without sacrificing idle quality at lower RPM ranges. Applications include street performance engines, bracket racing platforms, and naturally aspirated builds where Gen VI big block architecture serves as the foundation. Installation requires compatible valve train components, including lifters, pushrods, and rocker arms rated for roller cam compatibility and the specified lift values.