This stud fits most popular BBC Brodix, Dart, AFR, Edelbrock, World and RHS cylinder heads with long tube sheet metal valve covers.
Stud measures 4.50" overall with .500" of course, 2.750" of shoulder, 1.00" of fine thread and .200" of starter point. Will not work with regular rail valve covers. Picture shows type of valve cover that the stud is designed to be used with.
Studs are sold separately.