The Wiseco shelf-stock piston kit for BMW 2.5 12V M20B25 is a dish-top replacement set with an 8.8:1 compression ratio and sized for an 85.0mm bore. Intended as a direct replacement for engines machined or built to the 85mm bore specification, these pistons preserve the listed compression ratio and stock-style geometry for reliable rebuilds where the 85mm sizing is specified.
Wiseco BMW 2.5 12V M20B25 Dish 8.8:1 CR 85MM Bore Piston Shelf Stock Kit