This Wiseco single piston is specified for BMW M50B25 2.5L 24V turbo applications with an 84.50mm bore and +0.50mm oversize. The piston yields an 8.8:1 compression ratio and is sold individually for engine rebuilds needing that bore and CR. It is intended for exact fitment where the M50B25 engine requires a +0.50 oversize piston to restore proper clearances and compression.
Wiseco BMW M50B25 2.5L 24V Turbo 84.50MM Bore +0.50 Oversized 8.8:1 CR Piston - Single