These Proform extruded aluminum roller rocker arms will help rid your engine of internal friction. They feature a race-proven, full needle-bearing fulcrum and roller tip. And they not only unleash horsepower, but they also lengthen valvetrain component life and reduce wear and tear on valve stem tips. These rockers are precision-machined to ensure consistency and ratio accuracy, and they have a great looking blue anodized finish.
Rocker Arm Mounting Style: Stud
Rocker Arm Ratio: 1.6
Rocker Arm Style: Full roller
Stud Size: 3/8 in.
Shims Included: No
Rocker Arm Material: Aluminum
Rocker Arm Body Style: Standard
Rocker Arm Nut Style: Polylock
Slot Width: 0.600 in.
Maximum Spring Diameter: 1.500 in.
Rocker Arm Finish: Blue anodized
Quantity: Sold as a set of 16.
These rocker arms must be used with screw-in studs, guideplates and hardened pushrods.
Stud-Mounted Roller Rockers
Stud-mounted systems have been widely used by OEMs and are popular in street-performance applications for two basic reasons--cost and ease of adjustability. Stud-mounted systems use fewer parts and allow correct valvetrain geometry and lifter preload to be adjusted with pushrod length. The rocker is slipped over the stud, and its tip is allowed to rest on the tip of the valve stem. The pushrod side of the rocker can then be raised or lowered until correct valvetrain geometry is achieved, which is typically done through the use of an adjustable pushrod.