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This CP Piston and ring set is for the Subaru EJ257 engine, sized to a 100.5mm bore with a +1.0mm oversize and supplied as a set of four pistons. The listing includes a compression ratio reference of 8.2 and is intended for engine builds requiring the specified oversize pistons and rings to match a rebored block. Use when replacing or upgrading pistons to the stated dimensions for EJ257 applications.
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (100.5mm) - Size (+1.0mm) - CR (8.2) Set of 4
