Pontiac Extreme Energy Cam PXE268H-10

The COMP Cams Pontiac Extreme Energy Cam PXE268H-10 is a hydraulic flat tappet camshaft engineered for Pontiac V8 engines seeking increased valve lift and duration without sacrificing streetable characteristics. This single cam delivers 0.477-inch intake lift paired with 0.480-inch exhaust lift, operating across a 268-degree intake duration and 280-degree exhaust duration window—ideal for builders targeting responsive mid-range torque alongside higher RPM power delivery.

The 110-degree lobe separation angle (LSA) balances vacuum and idle quality with effective overlap for increased output between 1,600 and 5,800 RPM. This specification window makes the PXE268H-10 a proven choice for street performance applications where engine braking and part-throttle response remain priorities. The hydraulic flat tappet design requires zero additional synchronization hardware and maintains full compatibility with original Pontiac engine architecture, eliminating the need for custom valve train modifications or exotic lifter systems.

Builders restoring or upgrading vintage Pontiac V8 engines—whether 400, 428, or 455-cubic-inch variants—rely on Extreme Energy profiles to unlock responsiveness and audible character without requiring comprehensive engine geometry changes. This cam suits both restoration projects maintaining original architecture and performance builds where mild upgrades to fuel induction and exhaust systems complement increased valve event intensity.

COMP Cams' Extreme Energy line represents a mature segment of the camshaft market where specifications prioritize practical street manners over pure peak horsepower. The PXE268H-10 is sold as a single cam unit and requires proper installation by a qualified engine builder familiar with Pontiac V8 valve train geometry, including correct bearing clearances, lobe centering, and cam timing verification.