Crower 74701B Features:

Billet steel shaft-mount rockers for BIG BLOCK CHEVY with Dart Pro 1 310/325/345 aluminum cylinder heads. Includes 1-piece intake stands for added rigidity and accurate valvetrain geometry in racing applications. Shaft-mounted design helps optimize moment of inertia for stable valve control and higher rpm capability. Compatible with needle-bearing roller tip design to reduce friction, add horsepower, and cut valve guide wear.

Billet Shaft Rockers Bb C Steel Billet Shaft-mount For Features:

• Billet steel shaft-mount rocker system for Big Block Chevy with Dart Pro 1 310/325/345 aluminum cylinder heads and 1-piece intake stands
• Extreme-rigidity valvetrain design for precise rocker geometry, stable valve motion, and reliable high-rpm performance in racing applications
• Needle-bearing roller tip compatibility helps reduce friction, free up horsepower, and minimize valve guide and valve stem wear
• Optimized moment of inertia with lighter tips supports improved valve control, increased rpm capability, and longer valve spring life
• Package dimensions 24.75 in. H X 10.25 in. W X 3.00 in. D for shipment, with application-specific fitment for BB Chevy performance builds