The ARP head stud kit for Nissan RB20/RB20DET and RB25/RB25DET engines supplies dedicated head studs sized for those engines to secure the cylinder head. Head studs provide clamping for the head gasket and are intended for applications requiring strong, reliable head retention in the listed RB-series engines. This kit is specific to the RB20 and RB25 family as indicated in the description.
ARP Nissan RB20/20DET RB25/25DET Head Stud Kit