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Wiseco Professional Series forged pistons for 2004+ Subaru EJ257 2.5L 16V WRX STI applications, supplied as a set of four for a 100.00 mm bore and 0.020" oversize. These race-focused pistons feature precision ring grooves, anti-detonation groove, ArmorGlide skirt coating to reduce friction and seizure risk, forced pin oiling and fully machined crowns. They are forged and machined for heavy to severe duty performance builds.
Wiseco 2004+ Subaru EJ257 2.5L 16V WRX STI 100mm Bore 0.020 Oversize -15cc Vol 9.5 Comp - Set of 4
