Assault Racing aluminum stud girdles are made from 6061-T6 aluminum, manufactured to exacting standards, and are the solution to valvetrain instability. These stud girdles reduce rocker stud flex to retain critical valve lash adjustments. The result is more accurate valve lift and timing. Assault Racing stud girdles are relieved at the factory to accommodate crankcase evacuation components without the need to visit your local machine shop. These products come complete with polylocks. Applications: 262 1985-00 265 1955-57 267 1979-82 283 1957-67 302 1967-68 305 1976-00 307 1968-73 327 1962-69 350 1967-00 400 1970-80