Product Description Specifications Made from 6061-T6 aluminum this solid bar stud girdle set for 7/16" stud Ford 429-460 w/ TFS Motorsport heads ties rocker studs together to properly locate them. Includes hex adjusting nuts, set screws and hardware. Category: Engine Components>Stud Girdles Core: N LTL: N MPN: 4017 Proposition 65: Y Special Order: Y