ARP 5.4 4V 12pt Head Stud Kit. JDM only uses the top brand names in the industry when assembling their motors. If you are in the process of an engine build, JDM recommends the use of ARP Head studs when assembling your heads to the short block. These studs can be used more than once unlike your factory torque to yield head bolts. When assembling your 4.6 or 5.4 modular power plant go with ARP!