COMP Cams 1838-16 Ultra Pro Magnum XD Roller Rocker Arms Ratio Ford - 1.8 351C 429 460

The COMP Cams Ultra Pro Magnum XD roller rocker arms deliver professional-grade performance and durability for Ford big block engines. Engineered with a 1.8:1 rocker ratio, these rockers increase valve lift to maximize airflow and boost horsepower in Boss 302, 351 Cleveland, 429, and 460 cubic inch Ford engines.

Key Features:

• 1.8:1 rocker ratio for increased valve lift and performance
• Full roller design with needle bearings for reduced friction and wear
• Extruded aluminum body construction for strength and light weight
• Heavy-duty 7/16" rocker stud diameter for added stability
• Precision CNC-machined roller tip and trunnion for accuracy
• Heat-treated steel components in high-stress areas
• Compatible with positive seal valve stem seals
• Includes polylock adjustment nuts for precise lash setting

These Ultra Pro Magnum XD rockers feature COMP Cams' advanced manufacturing processes to ensure consistent geometry and proper valve train operation. The roller trunnion design significantly reduces friction compared to traditional bushing-style rockers, while the needle bearing roller tip minimizes side loading on valve stems. Ideal for street performance, oval track racing, and drag racing applications where reliability and maximum performance are essential.