Crower 74791F Features:

Big Block Chevy shaft-mount rockers for Pro-Filer Sniper 320 cc heads with 5/8 shaft fitment 17-4PH stainless steel construction with 1025 heat-treating for high-rpm valvetrain strength 1.650 arm length with 0.000 intake offset and 0.000 exhaust offset for matched geometry Premium oversized needle bearings, alloy steel tip rollers, and sure-lock rocker nuts included

Shaft Rockers Pro-filer B 17-4PH Stainless, 5/8 Shaft, BBC Features:

• 17-4PH stainless steel rockers with 1025 heat-treating for Big Block Chevy Sniper 320cc heads and 5/8 shaft fitment
• 1.650 arm length with zero intake and exhaust offset for precise valvetrain geometry and consistent rocker alignment
• Premium oversized needle bearings with alloy steel tip rollers for reduced friction, smoother operation, and wear control
• Shaft-mounted performance design for 355-375 raised-runner applications with stable high-rpm valvetrain control and accuracy
• Includes sure-lock rocker nuts for secure adjustment retention in demanding street-strip and racing engine builds