Crower 74714B Features:

Crower 74714B billet steel shaft mount rockers for BIG BLOCK CHEVY with AFR 18° 457 Magnum Billet cylinder heads and 1-piece intake stands. 1.800 rocker ratio on intake and exhaust with .000 rocker offset and .000 stand offset for precise valvetrain geometry in racing applications. CNC-machined from ball race alloy steel, heat-treated twice, and micro-finish ground in-house for strength, accuracy, and reduced friction. Fully rollerized precision needle bearing fulcrum, super-secured axles, and aircraft-quality 12-point nuts support stable high-rpm valve control.

Billet Shaft Rockers Bb C BBC Afr 18° 457 Features:

• CNC-machined billet steel shaft rockers for BBC AFR 18° 457 cc Magnum billet heads with 1-piece intake stands for added valvetrain stability
• 1.800 rocker ratio intake and exhaust with .000 offset and .000 stand offset for precise valvetrain geometry and reduced valve stem side loading
• Fully rollerized precision needle bearing fulcrum with super-secured axles for smooth operation, lower friction, and trouble-free high-rpm performance
• Ball race alloy steel construction, double heat-treated and micro-finish ground in-house for strength, wear resistance, and consistent race-duty durability
• Aircraft-quality 12-point nuts with shaft-mount design to minimize scrubbing, reduce friction, and help support added horsepower in racing applications