ARP Cylinder Head Stud Kit 250-4204 ARP Cylinder Head Studs fits 87-94 Ford 7.3 IDI Diesel Engines ONLY ARP cylinder head studs are cold-forged to ensure molecular integrity. They're heat-treated prior to thread rolling and machining. ARP Pro Series kits are also available with... MSRP: Was: Now: $638.75 Out of stock. Please Call For Availability