Crower 74186F Features:

17-4PH stainless steel shaft rocker assembly for SBC Edelbrock Victor Race Series 61229 heads, for 5/16 valves with 5/8 shaft diameter. CNC precision-machined 5/8 shaft uses ball race alloy steel, heat-treated twice and micro-finish ground for stable valvetrain geometry. Rocker arm length is 1.480 in. with required offsets of .550 intake and .200 exhaust for exact fit on Edelbrock 61229 applications. Fully rollerized precision needle bearing fulcrums help reduce friction and minimize valve stem scrubbing in high-rpm racing valvetrain setups.

Shaft Rockers SBC Edelbro 5/16 Valves 5/8 Shaft For Features:

• 17-4PH stainless steel shaft rockers for SBC Edelbrock Victor Race Series 61229 heads, sized for 5/16 valves and 5/8 shaft diameter
• CNC-machined ball race alloy steel shafts, double heat-treated and micro-finish ground for strength, stability, and precise valvetrain motion
• Fully rollerized precision needle bearing fulcrums reduce friction, limit valve stem scrubbing, and support sustained high-rpm operation
• 1.480 in. arm length with .550 intake offset and .200 exhaust offset for exact geometry on dedicated race head applications
• Aircraft-quality 12-point nuts with shaft-mounted design for secure valvetrain control, high-temperature durability, and long service life