What is the significance of the 2618 alloy forging?

The 2618 alloy is chosen for its superior strength and performance characteristics, making it well-suited for high-stress engine applications like those found in performance-tuned Subaru EJ257 engines.

What does the -22.00 CC dish mean for my engine?

The CC dish refers to the volume of the depression in the piston crown. This specific volume affects your engine's compression ratio, and it's a critical specification for achieving the desired performance and tuning goals for your EJ257.

Are these pistons compatible with all EJ257 engines?

These pistons are specifically designed for the 2.5L EJ257 engine. However, due to variations in builds and modifications, it's always recommended to confirm the bore size and specific engine requirements with your engine builder or mechanic before installation.

Specifications

Brand: Manley Performance
Part #: 652205C-4
UPC: 807298116440

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-t14-880121
Price: 827.84 USD
Availability: BackOrder

$827.84

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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 engines.
Forged from domestic 2618 alloy for superior strength and performance.
Features proven cam and barrel skirt profiles that help manage cylinder wall wear.
Exacting standards for ring lands and grooves enhance ring seal and power output.
Includes premium chrome moly wrist pins for durability.
100.00mm bore size with a -22.00 CC dish volume.

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

Starting with the 2618 alloy forgings, these Manley pistons are built for serious performance in your Subaru 2.5L EJ257 engine. When you're rebuilding the heart of your WRX or STi, especially for higher horsepower builds, the strength and reliability of your pistons are paramount. These are designed to handle the demands of a performance-tuned engine, offering a solid foundation for your build.

Manley uses a proven cam and barrel skirt profile on these pistons. This design helps them generate substantial power while also being considerate of your cylinder walls, reducing wear over time. The ring lands and grooves are machined to exacting standards, which is crucial for achieving a good seal and maximizing the power your engine makes. They also feature unique fixturing that allows the skirt to be turned and the ring grooves to be machined in the same operation, ensuring the ring grooves are perfectly square to the skirt. This attention to detail translates directly into better engine performance and longevity.

Included with this set are premium chrome moly wrist pins, known for their durability. For those pushing the limits, Manley offers upgrades to even stronger alloys. These pistons have a 100.00mm bore and a -22.00 CC dish, which is a specific volume that affects your engine's compression ratio. Keep in mind these are not CARB approved and cannot be shipped to California. If you're building a high-performance EJ257, these Manley pistons are a popular choice among professional engine builders for good reason.