Engines and Components› Pistons and Piston Rings

Manley Performance

Manley 04+ Subaru WRX STi (EJ257) STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings

$238.79

SKU: M004 612005C-1

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Manley Performance Platinum Series piston is a dish-style piston designed for the Subaru EJ257 engine. It features a 100mm bore size with a 0.5mm oversize, a 5.137-inch rod length, and a 1.209mm stroke. The compression distance is -22mm, and the dome volume is 51cc, resulting in a compression ratio of 8.5:1. This piston is constructed from 2618 alloy for superior performance and durability.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandManley Performance
Part NumberM004 612005C-1

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy