Crower 73638-16 Features:

Crower 73638-16 Enduro stud-mount roller rocker arms for Ford 289, 302, and 351W V8 engines 1.8 ratio with 7/16 in. stud fitment; sold as a 16-piece full kit for complete V8 valvetrain service 17-4PH stainless steel construction with 1025 heat-treat process for strength at high operating temperatures Premium oversized needle bearings, alloy steel tip rollers, and sure-lock rocker nuts help reduce friction and wear

Rocker Arms Ford 289 302 351W V8 1.8 Ratio Features:

• 17-4PH stainless steel construction with 1025 heat-treat process for high-strength valvetrain durability under racing loads
• 1.8 ratio stud-mount roller rockers for Ford 289, 302, and 351W V8 with 7/16 in. stud fitment and stable high-rpm operation
• Oversized needle bearings and alloy steel tip rollers for reduced friction, smoother valve action, and less stem wear
• Lightweight CNC-machined body with large-spring clearance for accurate geometry, lower side-loading, and high-rpm stability
• 16-piece full kit with sure-lock rocker nuts to support secure adjustment and extended valve spring life