COMP Cams 1631-16 Ultra Pro Magnum Rocker Arm Set w/ 1.6 Ratio for Ford 289-351W w/ 3/8" Stud

Investment cast from 8650 chromemoly steel with an arched, web-like design and black oxide finish, the COMP Cams Ultra Pro Magnum model 1631-16 is a set of 16 roller rocker arms rated for up to 850 lbs of open spring pressure. Featuring a 1.0 rocker ratio with 3/8 inch stud diameter for Ford 289-351W engines, these stud-mount rockers combine increased strength and rigidity with optimized clearances for most diameter springs, retainers, and plus.050 inch locks. The oversized trunnions, precision-sorted needle bearings, and hardened roller tips deliver performance and dependability, backed by a lifetime warranty against rocker body breakage.

• Rocker Arm Series: Ultra Pro Magnum
• Rocker Arm Material: 8650 Chromemoly Steel
• Rocker Arm Ratio: 1
• Rocker Stud Diameter: 3/8 IN
• Engine Family: Ford 289-351W
• Maximum Valve Spring Open Pressure: 850 lbs
• Valve Spring Lock Clearance: +.050 IN
• Trunnions: Oversized
• Needle Bearings: Precision-Sorted
• Roller Tips: Hardened
• Finish: Black Oxide
• C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.
• C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.