BBC Xtreme 4x4 Hyd. Cam X4 270H

The COMP Cams BBC Xtreme 4x4 Hydraulic Flat Tappet X4 270H is a purpose-built camshaft engineered for big block Chevy engines seeking aggressive street and strip performance. This hydraulic flat tappet cam delivers a 0.544-inch intake and 0.564-inch exhaust lift with 270-degree intake and 278-degree exhaust duration, making it a high-output choice for hot rod builders and performance enthusiasts pushing their BBC platforms to the limit.

The specifications are calibrated for serious power generation across the critical RPM band of 1,600 to 5,800. A 111-degree lobe separation angle balances intake and exhaust overlap for responsive low-end torque while maintaining top-end flow characteristics. The hydraulic flat tappet design eliminates the need for manual valve lash adjustment, a practical advantage for street-driven big blocks that experience temperature and load variation. This cam's duration and lift profile demands quality valve springs, solid pushrod geometry, and careful cam core lubrication to ensure long-term durability.

This is the right choice for BBC 454 or 427 builds where nitrous oxide assist, moderate boost, or naturally aspirated high-rpm combinations are planned. Serious engine builders and restoration shops recognize COMP Cams as the industry standard for big block applications. The BBC Xtreme 4x4 270H occupies the sweet spot between street manners and drag racing aggression, making it ideal for dual-purpose vehicles that demand both drivability and legitimate performance on the strip.