Description
For 2004+ Subaru WRX STI (EJ257) STD Stroke short-block builds, this Platinum Series piston listing brings the applicable Manley piston grades and dimensions together while keeping each SKU selectable at the variant level. The parent listing is distinguished by 99.5mm / 9.8:1, which should be cross-checked against the rest of the engine combination.
Compression target, deck height, valve clearance, ring end gap, and the selected connecting rod all interact with this 2004+ Subaru WRX STI (EJ257) STD Stroke piston choice; validate the complete short-block plan before purchase.
Key Product Details
- Application: 2004+ Subaru WRX STI (EJ257) STD Stroke
- Manley Series: Platinum Series
- Title Specification: 99.5mm / 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: 612100C-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
Piston selection should follow the measured finished bore and complete rotating-assembly specification. Do not choose a grade or oversize solely because it appears to fit the engine family.
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.