This IAG/ARP 14mm Head Stud Set is a top - notch solution for high - horsepower Subaru engines. It fits Subaru EJ25, FA20 DIT, and 2.0L EJ20 engines, including models like 2002 - 2021 WRX, 2004 - 2021 STI, 2005 - 2009 Legacy GT, and 2004 - 2013 Forester XT. The larger 14mm studs boost load capacity, preventing cylinder head lifting and head gasket failures. However, installation requires drilling and tapping the engine case, splitting the locating dowels, and enlarging the head stud hole clearances in the cylinder head. The set comes with 12 ARP2000 14mm x 1.5mm Head Studs, 12 ARP Washers, 12 ARP Nuts, and 1 ARP Fastener Assembly Lube. When installing, use head gaskets with 14mm stud provisions or drill them for fitment.
Using this IAG ARP 14mm Head Stud Set is a great way to enhance your Subaru engine's performance. First, make sure your engine is of the compatible models: EJ25, FA20 DIT, or 2.0L EJ20, such as WRX from 2002 - 2021, STI from 2004 - 2021, Legacy GT from 2005 - 2009, and Forester XT from 2004 - 2013. Before installation, gather all the tools you need. You'll have to drill and tap the engine case, split the OEM locating dowels, and enlarge the cylinder head stud holes. When it comes to head gaskets, you can either use ones with 14mm stud provisions or drill them to fit the larger studs. Remember to use the ARP Fastener Assembly Lube provided in the set. As for maintenance, regularly check the tightness of the studs. If you notice any signs of wear or damage, replace the parts as soon as possible. Also, keep the set clean to ensure long - lasting performance.
