What material is this piston made from?

This Manley piston is forged from domestic 2618 alloy. This material is chosen for its superior strength and performance characteristics, making it suitable for demanding engine builds.

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

The cam and barrel profiles on the piston skirt are designed to help generate substantial power while also minimizing wear on the cylinder walls. This helps ensure a longer lifespan for your engine components.

Does this piston come with a wrist pin?

Yes, this piston includes premium chrome moly wrist pins. Manley uses these for added durability in their standard series pistons.

Specifications

Brand: Manley Performance
Part #: 612207C-1

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

Name: Manley 04+ Subaru WRX STi (EJ257) 100.25mm Bore STD Stroke -17cc Dish - Single
Brand: Manley Performance
SKU: manley-performance-manley-04-subaru-wrx-sti-ej257-100-25mm-bore-std-stroke-17cc--t14-887527
Price: 189.71 USD
Availability: BackOrder

$189.71

On Backorder

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Manley 04+ Subaru WRX STi (EJ257) 100.25mm Bore STD Stroke -17cc Dish - Single Piston. Forged from 2618 alloy for strength.

Key Features

Fits 2004+ Subaru WRX STi (EJ257).
Single forged piston with a 100.25mm bore and -17cc dish.
Constructed from domestic 2618 alloy forgings for strength.
Features cam and barrel skirt profiles for power and cylinder wall protection.
Exacting ring lands and grooves ensure enhanced ring seal.
Includes premium chrome moly wrist pins.

This piston is designed for 2004 and later Subaru WRX STi models equipped with the EJ257 engine. It is not CARB approved and cannot be shipped to California.

⚠️ 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

If you're rebuilding the engine in your 2004 and up Subaru WRX STi with the EJ257 engine, this single forged piston from Manley is a solid choice. It's designed with a 100.25mm bore and a -17cc dish, intended for standard stroke applications. Manley uses domestic 2618 alloy forgings, which are known for their strength and ability to handle demanding engine conditions.

These pistons feature cam and barrel skirt profiles that help generate power while also being gentle on your cylinder walls, which is important for longevity. The ring lands and grooves are machined to strict standards to ensure a good seal, helping to maximize power output. Manley's unique manufacturing process allows them to machine the skirt and ring grooves in one operation, ensuring they are perfectly square to each other.

Keep in mind that this piston is not CARB approved and cannot be shipped to California. It comes with premium chrome moly wrist pins.