Crower 74153F Features:

Crower 74153F shaft-mount rocker system for SBC 23° RHS, Pro Topline, and Pro Action raised-runner long-arm cylinder head applications. 17-4PH stainless steel rocker arms with 1025 heat-treating help maintain rigidity, valvetrain accuracy, and long service life under sustained high heat. CNC-machined ball-race alloy steel shafts are heat-treated twice and micro-finish ground in-house for precise fit, smooth motion, and stability. Includes oversized needle bearings, alloy steel tip rollers, and sure-lock rocker nuts for dependable high-RPM operation and accurate valve control.

Shaft Rockers Pro Action SBC 23° Shaft-mount Stainless Steel Features:

• 17-4PH stainless steel shaft-mount rockers for SBC 23° raised-runner long-arm heads, extreme rigidity and stable valvetrain control
• CNC-machined ball-race alloy steel shafts, double heat-treated and micro-finish ground for precise rocker motion and lasting accuracy
• Premium oversized needle bearings and alloy steel tip rollers for reduced friction, smoother operation, and high-rpm durability
• Offset trunnion stud hole restores valve-tip geometry, reduces valve guide wear, and supports more accurate valve timing
• Sure-lock rocker nuts and stainless steel construction for extended service life in high-heat racing and marine endurance use