Engines and Components› Pistons and Piston Rings

Manley Performance

Manley 04+ Subaru WRX STi (EJ257) 75mm DE-STROKED 100mm +.5mm Bore 9.8:1 Dish Piston Set w/ Rings

$910.15

SKU: M004 621105C-4

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

Moderate — 2–4 hours

Description

Full set of 4 Manley Platinum Series pistons, wrist pins, ring sets, and round wire locks for the Subaru EJ257 motor. Forged from 2618 high-strength material with moly coated skirts, lightweight design, and offset wrist pin for quiet start-ups. Features pressure balance groove, accommodates +1mm valve sizes, premium steel top rings with Napier second ring, and higher tension oil rings for improved oil control.

Fitment

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

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Specifications

BrandManley Performance
Part NumberM004 621105C-4

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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