These Aluminum Roller Rocker Arms from COMP Cams® are designed for Chevy V6 200-262 applications. Engineered with a 3/8" stud diameter and 1.65 ratio, they are made from a high quality aluminum alloy with a tensile strength of 80,000 psi. Needle bearing trunions allow valve spring pressures of up to 350 lbs. open pressure, making Aluminum Roller Rocker Arms a good choice for many street applications.