ARP 11mm Head Studs Subaru WRX 2002-2014 / STI 2004-2021 Subaru EJ20 & EJ25 Turbo

Experience unparalleled strength and durability with ARP Pro Series cylinder head studs designed for 11mm applications on Subaru models. These head studs are crafted through cold-forging to ensure molecular integrity, and are then heat-treated prior to thread rolling and machining. Choose from kits with 12-point nuts and hardened parallel washers for an even load distribution and accurate torque readings. Designed for high-performance enthusiasts, these head studs provide the robustness needed to prevent head lifting, making them a must-have for racecars, rally cars, overlanders, or even daily drivers seeking enhanced performance. With a wide selection of models ready to ship, you can trust ARP Head Stud Kits to elevate your Subaru's power and boost levels beyond factory specifications. Made using premium grade alloy materials that deliver superior fatigue cycle life 11mm profile Each stud is placed vertically in special racks Heat treated to 220,000 psi Thread-rolled to provide 1000%