What material are these pistons made from?

These pistons are forged from domestic 2618 alloy. This material is chosen for its strength and performance capabilities, making it suitable for demanding engine builds.

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

The cam and barrel profiles on the piston skirts are designed to help generate substantial power. They also help to reduce wear on the cylinder walls, contributing to longer engine life.

Are these pistons compatible with all EJ257 engines from 2004 onwards?

This specific piston is a standard bore (99.50mm) size for the EJ257 engine found in 2004 and later Subaru WRX STi models. It's important to verify your engine's bore size before ordering to ensure a proper fit.

Specifications

Brand: Manley Performance
Part #: 612000CA-1
UPC: 807298084398

Manley 04+ WRX STi (EJ257) Size (STD) Stroke (79mm) Bore (99.50mm Grade A) SINGLE Piston w/ Rings

Name: Manley 04+ WRX STi (EJ257) Size (STD) Stroke (79mm) Bore (99.50mm Grade A) SINGLE Piston w/ Rings
Brand: Manley Performance
SKU: manley-performance-manley-04-wrx-sti-ej257-size-std-stroke-79mm-bore-99-50mm-gra-t14-299122
Price: 204.36 USD
Availability: InStock

$204.36

Only 1 left in stock

Manley Performance forged piston for 04+ WRX STi (EJ257). STD bore (99.50mm), 79mm stroke. Known for strong engine components.

Key Features

Fits 2004+ Subaru WRX STi (EJ257).
Forged from domestic 2618 alloy for strength and performance.
Standard bore size of 99.50mm (Grade A) with a 79mm stroke.
Features proven cam and barrel skirt profiles for power and cylinder wall protection.
Exacting standards for ring lands and grooves enhance ring seal.
Includes premium Chrome Moly wrist pins.

This piston is designed for the 2004 and later Subaru WRX STi 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

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

Manley Performance is well-known for building strong engine components, and these pistons are a prime example. If you're rebuilding the engine in your 2004 and later Subaru WRX STi with the EJ257 engine, these standard bore (99.50mm) pistons are built to handle the demands of performance tuning. They feature a 79mm stroke and come complete with rings, ready for installation.

These pistons are forged from domestic 2618 alloy, which is a strong material chosen for its performance and durability under stress. Manley also uses proven cam and barrel skirt profiles that help generate power while being easier on your cylinder walls. The ring lands and grooves are machined to strict standards, which helps ensure a better seal for more power. They also use unique fixturing during manufacturing to ensure the ring grooves are perfectly square to the skirt, a detail that matters for consistent performance.

These pistons are a solid option for engine builders looking for reliable performance. Keep in mind that these are not CARB approved and cannot be shipped to California.