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 ability to withstand the high temperatures and pressures found in performance engines, ensuring durability and reliable operation.

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

The cam and barrel skirt profiles are designed to optimize piston movement within the cylinder. They help generate substantial power by ensuring efficient combustion while also being gentler on the cylinder walls, reducing wear over time.

Are any additional components included with this piston set?

This set includes the pistons and premium Chrome Moly wrist pins. Ring sets are typically sold separately and should be chosen based on your specific engine build requirements.

Specifications

Brand: Manley Performance
Part #: 652201C-4
UPC: 807298116402

Manley Subaru 2.5L EJ257 WRX STi Piston Set - 99.55mm Bore 1.209in CH, -22.00 CC

Name: Manley Subaru 2.5L EJ257 WRX STi Piston Set - 99.55mm Bore 1.209in CH, -22.00 CC
Brand: Manley Performance
SKU: manley-performance-manley-subaru-2-5l-ej257-wrx-sti-piston-set-99-55mm-bore-1-20-t14-880141
Price: 827.84 USD
Availability: BackOrder

$827.84

On Backorder

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

Manley Subaru 2.5L EJ257 WRX STi Piston Set - 99.55mm 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 proven cam and barrel skirt profiles for efficient power generation and reduced cylinder wall wear.
Exacting standards for ring lands and grooves ensure enhanced ring seal and more 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 Subaru 2.5L EJ257 engines. 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

Manley Performance is well-known for building strong engine components, and their Subaru 2.5L EJ257 WRX STi piston set is a prime example. If you're rebuilding the heart of your performance Subaru, these pistons are designed to handle the demands of a high-output engine. They feature a 99.55mm bore and a -22.00 CC dish volume, making them a solid choice for serious engine builds.

These pistons are forged from domestic 2618 alloy, a material chosen for its exceptional strength and ability to withstand high temperatures and pressures without deforming. Manley uses proven cam and barrel skirt profiles, which help generate power efficiently while also being gentler on your cylinder walls during operation. The ring lands and grooves are machined to exacting standards, ensuring a tight seal for improved combustion efficiency and more power. For added durability, these pistons come with premium Chrome Moly wrist pins, and Manley's unique fixturing process ensures the ring grooves are perfectly square to the skirt, which is critical for proper ring seal and longevity.

This set is intended for performance engine builds and is not CARB approved, meaning it cannot be shipped to California. If you're looking to build a robust EJ257 engine, these Manley pistons offer the strength and precision needed for reliable performance.