What material are these pistons made from and why is it important?

These pistons are forged from domestic 2618 alloy. This material is chosen for its superior strength and performance capabilities, making it well-suited for high-stress engine applications.

What is the purpose of the cam and barrel skirt profiles?

The cam and barrel (skirt) profiles are designed to generate substantial power while being gentle on the cylinder walls. This helps to reduce friction and wear, contributing to engine longevity and consistent performance.

Are these pistons compatible with all Subaru WRX STi models?

This specific piston set is designed for 2004 and up Subaru WRX STi models with the EJ257 engine. It is important to verify that your vehicle has this specific engine code and model year range before purchasing.

Specifications

Brand: Manley Performance
Part #: 612207C-4
UPC: 807298107912

Manley 04+ Subaru WRX STi (EJ257) 100.25mm Bore STD Stroke -17cc Dish

Name: Manley 04+ Subaru WRX STi (EJ257) 100.25mm Bore STD Stroke -17cc Dish
Brand: Manley Performance
SKU: manley-performance-manley-04-subaru-wrx-sti-ej257-100-25mm-bore-std-stroke-17cc--t14-205103
Price: 758.81 USD
Availability: BackOrder

$758.81

On Backorder

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Manley 04+ Subaru WRX STi (EJ257) 100.25mm Bore STD Stroke -17cc Dish Piston Set. Built with 2618 alloy for superior strength.

Key Features

Fits 2004 and up Subaru WRX STi with EJ257 engine.
Forged from domestic 2618 alloy for superior strength and performance.
Features proven cam and barrel skirt profiles to reduce cylinder wall wear.
Exacting standards for piston ring lands and grooves enhance ring seal and power.
Includes premium chrome moly wrist pins for added durability.
Unique fixturing ensures ultimate ring groove to skirt squareness.

This piston set is designed for 2004 and up Subaru WRX STi models equipped with the EJ257 engine. Please verify fitment for your specific vehicle.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Manley Performance is well-known for building robust engine components, and their Platinum Series pistons are a prime example of that commitment. If you're rebuilding the engine in your 2004 and up Subaru WRX STi with the EJ257 engine, this set of pistons is designed to handle serious performance demands. They feature a 100.25mm bore and a standard stroke with a -17cc dish, which is a common configuration for many performance builds.

These pistons are forged from domestic 2618 alloy, a material chosen for its exceptional strength and ability to perform under high stress. Manley also incorporates proven cam and barrel skirt profiles, which help to reduce friction and wear on your cylinder walls while still generating significant power. The ring lands and grooves are machined to very strict standards, ensuring a tight seal for improved combustion efficiency and more power output. For added durability, they come with premium chrome moly wrist pins, and Manley's unique fixturing process ensures the ring grooves are perfectly square to the skirt, a detail that matters for consistent performance.

This piston set is a solid option for anyone looking to build a reliable, high-performance engine. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. You'll want to refer to the manufacturer's installation instructions for specific details on fitting these pistons into your EJ257 engine.