ARP Custom Age 625+ Head Stud Kit Subaru 2002-2014 WRX / 2004-2021 STI

ARP Pro Series 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 12-point nuts, and all kits come complete with hardened parallel washers for an even load distribution and accurate torque readings. With hundreds of models ready to ship, these cylinder head fasteners can be ordered for virtually any style engine. Made using newly formulated super-alloy demonstrates superior fatigue cycle life High tensile strength and toughness of 260,000-280,000 psi Resistance to atmospheric corrosion and oxidation Includes (12) head studs Includes (12) nuts Includes (12) washers Socket Size(s) 9/16 12pt, 3/16 Allen Fitment: 2002-2014 Subaru WRX 2004-2021 Subaru STI 2004-2013 Subaru Forester XT 2005-2009 Subaru Outback XT 2005-2012 Subaru Legacy GT 2004-2006 Subaru Baja Turbo