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JE Pistons single forged piston for Subaru EJ-series (EJ257) is a left-side replacement piston with a 3.927 in bore and 8.50:1 compression, inverted dome/dish design. Manufactured in the USA from 2618 aluminum, JE's application-specific pistons use FSR forging, optional skirt coatings, and premium rings and hardware to support high-demand performance and motorsports engine assemblies.
JE Pistons SUB STI EJ257 Block w/ EJ20 Head 99.75mm Bore Single Piston - Left
