Wiseco 99.5mm Forged Pistons 8.9:1 Compression Subaru 2006-2014 WRX / 2004-2019 STI

World renowned for their race winning pistons, Wiseco uses their diverse experience in building high performance engines for Formula 1, Indy Racing League, and NHRA Pro Stock to design and manufacture the highest technology sport compact pistons available. Every set of Wiseco sport compact pistons are made from dedicated in-house forgings to produce a light weight piston with superior strength and optimal design. As a multivalve piston technology leader, Wiseco pistons feature specially designed valve pockets, complex dome and crown shapes, stainless steel gas nitride rings and optimized skirt profiles. All Wiseco sport compact pistons also come standard with their proprietary ArmorGlide skirt coating material for reduced friction, freeing up additional horsepower. Wiseco pistons are sold as a full set of four (4) pistons and include all corresponding rings, pins and clips.