What material are these pistons made from?

These Manley pistons are forged from domestic 2618 alloy. This material is chosen for its superior strength and performance characteristics, making it suitable for high-output engines.

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

The cam and barrel profiles on the piston skirts are designed to optimize the piston's movement within the cylinder. This shape helps to generate substantial power while also minimizing wear on the cylinder walls.

Are these pistons compatible with all Subaru WRX STi models?

This specific piston set is designed for the Subaru 2.5L EJ257 engine. While this engine is found in many WRX STi models, it's important to confirm that your vehicle is equipped with the EJ257 engine before purchasing.

Specifications

Brand: Manley Performance
Part #: 652205CE-4
UPC: 807298116464

Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.209in CH, -22.00 CC

Name: Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.209in CH, -22.00 CC
Brand: Manley Performance
SKU: manley-performance-manley-subaru-2-5l-ej257-wrx-sti-piston-set-100-00mm-bore-1-2-t14-880122
Price: 963.51 USD
Availability: BackOrder

$963.51

On Backorder

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Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.209in CH, -22.00 CC. Forged from 2618 alloy for superior strength.

Key Features

Fits Subaru 2.5L EJ257 WRX STi engines.
Forged from domestic 2618 alloy for superior strength and performance.
Features cam and barrel skirt profiles for efficient power generation and cylinder wall protection.
Precision ring lands and grooves ensure enhanced ring seal for more power.
Includes tool steel wrist pins for added durability.
Piston bore size is 100.00mm.

This piston set is designed for Subaru 2.5L EJ257 engines. Please verify compatibility with your specific vehicle model and year.

⚠️ 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 forged pistons are a popular choice among professional engine builders and tuners. This piston set is specifically made for the Subaru 2.5L EJ257 engine found in WRX STi models, featuring a 100.00mm bore size. If you're rebuilding the heart of your performance Subaru, these pistons are designed to handle the demands of a high-output engine.

These pistons are forged from domestic 2618 alloy, which offers strong performance and durability. They feature cam and barrel skirt profiles that are shaped to generate power efficiently while also being considerate of your cylinder walls during operation. Manley also pays close attention to the details, adhering to strict standards for the ring lands and grooves. This precision ensures a better seal from your piston rings, which directly translates to more power. The set includes tool steel wrist pins for added strength, and Manley's unique manufacturing process ensures the ring grooves are perfectly square to the piston skirt, a critical detail for proper sealing and performance.

This set is designed for a 100.00mm bore and has a compression height of 1.209 inches, with a dish volume of -22.00 CC. Please note that these pistons are not CARB approved and cannot be shipped to California. If you're building a serious performance engine, these Manley pistons are a solid option to consider.