Description
Manley developed this Platinum Series piston configuration for 2004+ Subaru WRX STI (EJ257) STD Stroke 100mm +; use the listed bore and compression details to match the piston to the finished cylinder and intended rotating assembly. The parent listing is distinguished by 8.5:1, which should be cross-checked against the rest of the engine combination.
For 2004+ Subaru WRX STI (EJ257) STD Stroke 100mm + 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 100mm +
- Manley Series: Platinum Series
- Title Specification: 8.5:1
- 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: 612005C-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
Machine-shop measurements should determine the final piston selection. Check bore class/grade, compression geometry, ring package, pin dimensions, and intended rod/stroke combination.
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.