Product Description Specifications Constructed from 6061-T6 aluminum this spring-loaded stud girdle set for 3/8" stud Chevrolet 265-400 Small Block ties rocker studs together to properly locate them. Kit includes hex adjusting nuts, set screws and hardware. Category: Engine Components>Stud Girdles Core: N LTL: N MPN: 4001 Proposition 65: Y Special Order: Y