ARP Main and Block Bolts Subaru WRX 2002-2014 / STI 2004-2021 / Legacy GT 2005-2009

Part #: 260 - 5401. These ARP main bolts for Subaru EJ20, EJ25, and EJ257 engines are made from 8740 forged chrome moly. They have a large under - head radius and rolled threads, which offer outstanding reliability. After heat - treating, the threads are rolled, giving them 1000% longer fatigue life than regular bolts. Paralell - ground hardened washers are included. These crankcase through bolts fit all EJ series motors. They are suitable for 2004 - 2008 Forester XT, 2002 - 2014 Subaru WRX, 2005 - 2009 Legacy GT, 2005 - 2009 Outback XT, and 2004 - 2020 STI models.

Using these ARP main and block bolts is straightforward. First, make sure your engine is clean and free of debris. Then, carefully install the bolts in the correct positions according to your engine's specifications. Don't forget to use the included paralell - ground hardened washers. When tightening the bolts, follow the recommended torque settings. As for maintenance, regularly check the bolts for any signs of wear or looseness. If you notice any issues, replace the bolts right away. Keep them dry and clean to prevent rusting. This will help ensure the long - term performance and reliability of your engine.