Crower 74102F Features:

Crower 74102F shaft rocker system for SBC Dart 12.5° cylinder heads with a 5/8 in. shaft. Stainless steel rockers with 1.650 in. arm length, 0.550 in. intake offset, and 0.250 in. exhaust offset. CNC precision-machined, twice heat-treated, and micro-finish ground for strength, rigidity, and accurate valvetrain motion. Fully rollerized needle bearing fulcrums and super-secured axles help reduce friction, wear, and valve guide stress.

Shaft Rockers Sb Chevy Da Dart 12.5° 5/8 In. Features:

• Stainless steel shaft-mount rockers for SBC Dart 12.5° heads, 5/8 in. shaft design for extreme rigidity, stable geometry, and accurate valvetrain motion at high rpm.
• CNC-machined, double heat-treated, micro-finish ground construction with fully rollerized needle-bearing fulcrums to reduce friction, wear, and power loss.
• 1.650 in. arm length with 0.550 in. intake offset and 0.250 in. exhaust offset for fitment matched to Dart 12.5° small-block Chevy applications.
• Super-secured axles and high-temperature-capable stainless steel body support reliable operation in endurance racing, dirt late model, and marine use.
• Easy-service shaft system with Stand ID 012F; replacement stand part number 74400X012F, with optional tip, pin, and bushed upgrades for custom setups.