Engines and Components› Pistons and Piston Rings

Manley Performance

Manley 04+ Subaru WRX STi (EJ257) 75mm DE-STROKED 100mm +.5mm Bore 8.5:1 Dish Piston (SINGLE Piston)

$238.79

SKU: M004 621005C-1

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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Manley Performance Platinum Series piston is a high-performance component designed for de-stroked EJ257 engines. Constructed from 2618 alloy forgings, it features a dish-type design with a 100mm bore size and a 51cc dome volume. This piston contributes to an 8.5:1 compression ratio and includes tool steel wrist pins.

Fitment

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Specifications

BrandManley Performance
Part NumberM004 621005C-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.

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