Crower 74138F Features:

17-4PH stainless steel shaft rockers with a 1025 heat-treat process for added strength and long service life. SBC Pro Action 14° design with 1.650 in. arm length and heavy-duty 5/8 in. shafts for high-rpm valvetrain stability. Oversized needle bearings, alloy steel tip rollers, and sure-lock rocker nuts support accurate motion and dependable retention. Lightweight body design helps optimize moment of inertia and provides clearance for large-diameter valve springs.

Shaft Rockers Pro Action 14° 1.650 In. Arm Length Features:

• 17-4PH stainless steel construction with 1025 heat-treated strength, built for high-load valvetrain durability in racing and endurance use
• 1.650 in. arm length with 5/8 in. shafts for rigid rocker geometry, improved stability, and accurate valve motion at high RPM
• Oversized needle bearings and alloy steel tip rollers reduce friction, support smooth operation, and enhance long-term wear resistance
• Lightweight body design with added large-diameter valve spring clearance, helping optimize moment of inertia and simplify installation access
• Sure-lock rocker nuts with shaft-mount rigidity for precise valvetrain control, longer service life than aluminum rockers, and easier maintenance