Crower 73646-1 Features:

17-4PH stainless steel stud-mounted roller rocker arm for AMC 290-401 V8 applications 1.6 rocker ratio with 7/16 in. stud fitment for precise valvetrain geometry Includes sure-lock rocker nut, oversized needle bearings, and alloy steel tip roller Lightweight Enduro body with 1025 heat treating for spring clearance and long service life

Rocker Arms AMC 290-401 1 1.6 Ratio 7/16 In. Features:

• 1.6 ratio for AMC 290-401 V8 valvetrain response and optimized valve lift characteristics for performance builds
• 17-4PH stainless steel body with 1025 heat treating for strength, wear resistance, and long service life
• Stud-mounted design for 7/16 in. studs with lightweight body clearance for large-diameter valve springs
• Oversized needle bearings and alloy steel tip roller for reduced friction, accurate valve timing, and smoother operation
• Sold as 1-piece rocker arm with sure-lock rocker nut for custom replacement, ratio tuning, or mixed intake-exhaust setups