These Proform 1.7 pedestal mount rocker arms for 5.8L Lightning require you to re-use your existing rocker channels.
Reduce friction and unleash horsepower
These Proform pedestal mount extruded aluminum roller rocker arms rid your engine of internal friction. Their race-proven full needle-bearing fulcrum and roller tip not only unleash horsepower, they also lengthen valvetrain component life, and reduce wear and tear on valve stem tips. They're precision-machined to ensure consistency and ratio accuracy.
Rocker Arm Mounting Style: Pedestal
Rocker Arm Ratio: 1.7
Rocker Arm Style: Full roller
Stud Size: 5/16 in.
Shims Included: No
Rocker Arm Material: Aluminum
Rocker Arm Body Style: Standard
Maximum Spring Diameter: 1.500 in.
Rocker Arm Finish: Blue anodized
Quantity: Sold as a set of 16.
Pedestal-mount roller rockers
Pedestal-mount roller rockers are what the 5.8L engine came with from the factory, and what many cam manufac-turers offer in roller form as easy valvetrain upgrades. Pedestal-mount rockers, roller or otherwise, fasten to the cylinder head resting on aluminum pedestals that form a base for the rocker arm to rest upon. The pedestals rest in a sheet metal channel that ties the rockers together in pairs and prevents excessive side-to-side movement of the rocker tip on valve. A long, 5/16-inch cap screw goes through the center of the rocker's fulcrum, through the pedestal, and into the boss on the cylinder head.