Crower 74151F Features:

Stainless steel shaft-mount rockers for SBC GM LA heads with 1.8:1 to 2:1 ratios and 5/8 in. shafts. CNC precision-machined ball race alloy steel shafts are heat-treated twice and micro-finish ground in-house. Fully rollerized precision needle-bearing fulcrum and hardened tip wheels help reduce scrubbing under racing loads. Aircraft-quality hi-temp alloy lash adjusters are precision thread-rolled after a double heat-treat process.

Shaft Rockers SBC Gm LA 1 Stainless Steel 1.8:1 Features:

• Stainless steel shaft-mount rockers with 1.8:1 to 2:1 ratios for SBC GM LA heads and 5/8 in. shafts, race-ready valvetrain control
• CNC-machined ball race alloy steel shafts, double heat-treated and micro-finish ground for rigidity, accuracy, and long service life
• Fully rollerized needle-bearing fulcrum with hardened tip wheels to reduce scrubbing and support stable high-rpm valve action
• Aircraft-quality hi-temp alloy lash adjusters with precision thread-rolled construction for accurate adjustment and racing durability
• Optimized for high-temperature racing use with improved valve control, reduced friction, and lower valve guide wear