Engines and Components› Pistons and Piston Rings

Manley Performance

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

$950.03

SKU: M004 612005C-4

In Stock
In Stock
Ships by Jun 15
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The EJ25 engine can only sustain so much power until the guts of the engine give out. That is why forged pistons are always a common ingredient in any boosted engine aiming to make more power. The Manley Performance Platinum Series Pistons are an excellent choice as they feature very strong forged alloy construction to sustain the power and stress that comes with more horsepower and more boost.

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-4

Videos

How to Build a Subaru EJ Engine that won't BLOW UP!

How to Build a Subaru EJ Engine that won't BLOW UP!
Building a 500WHP Capable EJ25 to Giveaway!

Building a 500WHP Capable EJ25 to Giveaway!
Stock vs race pistons: Which is better?

Stock vs race pistons: Which is better?

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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