What material is this piston made from?

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

What is the compression ratio of this piston?

This piston features an 8.5:1 dish compression ratio. This specification is important to consider when planning your engine build to achieve your desired performance goals.

Does this piston come with rings and wrist pins?

This listing is for a single piston. It includes premium chrome moly wrist pins. Piston rings are typically sold separately and should be chosen based on your engine's specific requirements.

Specifications

Brand: Manley Performance
Part #: 612002C-1
UPC: 807298024394

Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.75mm +.25mm Bore 8.5:1 Dish SINGLE PISTON AND RING

Name: Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.75mm +.25mm Bore 8.5:1 Dish SINGLE PISTON AND RING
Brand: Manley Performance
SKU: manley-performance-manley-04-subaru-wrx-sti-ej257-std-stroke-99-75mm-25mm-bore-8-t14-284513
Price: 189.71 USD
Availability: BackOrder

$189.71

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2004-2011 Subaru Impreza WRX STi. Manley forged piston with 8.5:1 dish, built with 2618 alloy for improved strength.

Key Features

Fits 2004-2011 Subaru Impreza WRX STi.
Single forged piston with 8.5:1 dish compression ratio.
Constructed from domestic 2618 alloy forgings for superior strength.
Includes premium chrome moly wrist pins for added durability.
Features cam and barrel skirt profiles for efficient power generation and cylinder wall protection.
Precisely machined ring lands and grooves ensure enhanced ring seal.

⚠️ 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 2004-2011 Subaru WRX STi with the EJ257 engine, this single forged piston from Manley Performance is a solid option. It's designed with a standard stroke and a +.25mm bore, featuring an 8.5:1 dish compression ratio. Manley uses domestic 2618 alloy forgings, which are known for their strength and ability to handle demanding conditions, making them a popular choice among professional engine builders.

These pistons feature cam and barrel skirt profiles that help generate power while being easy on your cylinder walls. The ring lands and grooves are machined to strict standards, which helps ensure a better seal from your piston rings, ultimately contributing to more power. Each piston also comes with premium chrome moly wrist pins for added durability. Manley's unique fixturing process allows them to machine the skirt and ring grooves in one operation, ensuring the ring groove stays square to the skirt.

Keep in mind that this piston is not CARB approved and cannot be shipped to California. It's sold individually, so be sure to order the correct quantity for your engine build.