COMP Cams XE256H-10 Xtreme Energy Camshaft for Chevrolet Big Block Engines

Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts, the Xtreme Energy grind family offers gains in torque and horsepower while still delivering adequate vacuum for power brakes and other vacuum dependent accessories. Xtreme Energy camshafts work great in carbureted applications, but offer the best performance with aftermarket intake manifolds, lower gear ratios, headers and free flowing exhaust. Strong torque thru low and mid-range, good idle. Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

The COMP Cams XE256H-10 Xtreme Energy camshaft is engineered for Chevrolet GEN IV 396-454 big block engines that originally came with flat tappet camshafts. This high-performance camshaft features a quicker valve opening, resulting in increased responsiveness and more area under the lift curve for enhanced power delivery. Designed to improve overall engine performance without compromising drivability, the XE256H-10 provides notable gains in torque and horsepower while maintaining adequate vacuum levels essential for power brakes and other vacuum-dependent accessories. Its versatile design makes it suitable for carbureted applications, especially when paired with aftermarket intake manifolds, headers, lower gear ratios, and free-flowing exhaust systems. This combination ensures maximum efficiency and power output across a broad RPM range, making it ideal for street performance and muscle car enthusiasts.

The camshaft’s profile delivers strong torque through low and mid-range RPMs, ensuring smooth idle operation and enhanced throttle response. Its compatibility with Chevrolet big block engines means it