COMP Cams Magnum Chromoly Roller Tip Rocker Arm - 3/8 in Stud Mount - 1.6 Ratio - Small Block Chevy (Set of 8) 4063 Extra threaded port for separate

Extra threaded port for separate bleeder or brake line pressure gauge

This can cause issues with rotor phasing

4-L Ford Engines

oil-filled hydraulic stock bushings

COMP Cams Magnum Chromoly Roller Tip Rocker Arm - 3/8 in Stud Mount - 1.6 Ratio - Small Block Chevy (Set of 8) 4063 Extra threaded port for separateThese Magnum Roller Rocker Arms for Small Block Chevy 265 400 applications are the ultimate street rocker. With a 3 8" stud diameter and 1. 6 ratio, they are designed for serious performance enthusiasts. All Magnum Roller Rocker Arms are constructed from 8620 chromemoly steel, which is a superior material that will not flex and assures maximum lift. Their roller tip reduces friction, while stiff design and superior ratio accuracy yield more effective