This single piston is perfect for SUBARU WRX 2.5L STI, FORESTER, and LEGACY. It features a 99.75mm bore, 79.0mm stroke, 130.5mm rod, 23mm pin, -19.3cc volume, and weighs 401g.

To use this piston, first make sure your engine is clean and free of debris. Carefully install the piston into the cylinder using proper tools. When installing, align it correctly to ensure smooth operation. Be gentle to avoid any damage. As for maintenance, regularly check the piston for wear and tear. If you notice any abnormal noises or reduced performance, it might be time to inspect the piston. Keep the engine well - lubricated to extend the piston's lifespan. Also, make sure to follow the manufacturer's guidelines for engine servicing.