ARP 625 HEAD STUD INSTALL ON A 6 7 CUMMINSIncluded One 10mm Headstud kit 4 Bolts, washers and nuts. The Fastest Raptors in the world and proven to work in our very own record setting Raptor 700. ARP Undercut Head Stud Kit for Honda 2.2L H22A4 Prelude 208-4304.