Description
This Platinum Series piston family targets Subaru WRX STI 2.5L EJ257 99.75 Mm Bore 1.285 In. CH 18.00 CC engine combinations and should be selected from the finished-bore specification rather than from vehicle fitment alone. Use the exact Manley part number shown below to distinguish this product from similar pistons offered for the same or related engine family.
Compression target, deck height, valve clearance, ring end gap, and the selected connecting rod all interact with this Subaru WRX STI 2.5L EJ257 99.75 Mm Bore 1.285 In. CH 18.00 CC piston choice; validate the complete short-block plan before purchase.
Key Product Details
- Application: Subaru WRX STI 2.5L EJ257 99.75 Mm Bore 1.285 In. CH 18.00 CC
- Manley Series: Platinum Series
- Product Family Detail: 2618-alloy forged piston construction
- Product Family Detail: tool-steel wrist-pin hardware on applicable part numbers
- Product Family Detail: moly skirt coating on applicable part numbers
- Manufacturer Part Number: 621002C-1
Package Quantity
Sold individually. This listing supplies one piston per selected SKU; order the quantity required for your engine and verify that all pistons match the machine shop’s bore/grade plan. This quantity applies to the selected Manley SKU family shown on this product page.
Selection & Fitment Notes
Confirm finished bore size, required piston grade, compression ratio, compression height, pin specification, ring package, and piston-to-wall clearance with your machine shop or engine builder.
Professional engine assembly and measurement are recommended. Product specifications should be confirmed against the selected Manley part number and the requirements of the exact engine build.