Description
This Platinum Series piston family targets 2004+ Subaru WRX STI (EJ257) STD Stroke 99.75mm + engine combinations and should be selected from the finished-bore specification rather than from vehicle fitment alone. The parent listing is distinguished by 25mm / 9.8:1, which should be cross-checked against the rest of the engine combination.
For 2004+ Subaru WRX STI (EJ257) STD Stroke 99.75mm + builds, piston grade and bore size should be treated as measured engine-build specifications. Confirm the matching cylinder and any required piston-to-wall clearance before assembly.
Key Product Details
- Application: 2004+ Subaru WRX STI (EJ257) STD Stroke 99.75mm +
- Manley Series: Platinum Series
- Title Specification: 25mm / 9.8:1
- 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: 612102C-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.