What is the purpose of the cam and barrel skirt profiles on these pistons?

These profiles are designed to help the piston move smoothly within the cylinder bore. They help generate power while also reducing wear on the cylinder walls, contributing to longer engine life.

What material are the included wrist pins made from?

This set comes standard with premium chrome moly wrist pins. Manley also offers upgrades to even stronger alloys like 9310 and Turbo Tuff/DLC for extreme applications.

What does the -14.00 CC dish volume signify?

The dish volume is a measurement of the indentation on the piston crown. This specific volume is important for achieving the correct compression ratio when paired with your cylinder heads and gasket thickness.

Specifications

Brand: Manley Performance
Part #: 652505CE-4
UPC: 807298116822

Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.130in CH, -14.00 CC

Name: Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.130in CH, -14.00 CC
Brand: Manley Performance
SKU: manley-performance-manley-subaru-2-5l-ej257-wrx-sti-piston-set-100-00mm-bore-1-1-t14-880128
Price: 963.51 USD
Availability: BackOrder

$963.51

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Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.130in CH, -14.00 CC. Forged from 2618 alloy for superior strength in high-performance builds.

Key Features

Fits Subaru 2.5L EJ257 WRX STi.
Forged from domestic 2618 alloy for superior strength and performance.
Features proven cam and barrel skirt profiles that help manage cylinder wall wear.
Exacting ring lands and grooves are machined to strict standards for enhanced ring seal.
Includes premium chrome moly wrist pins for added durability.
100.00mm bore size with a -14.00 CC dish volume.

This piston set is designed for Subaru 2.5L EJ257 engines. Always confirm compatibility with your specific vehicle's engine code and build specifications.

⚠️ 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

Built from domestic 2618 alloy forgings, these Manley pistons are a solid choice for anyone rebuilding or significantly upgrading their Subaru 2.5L EJ257 engine. The 100.00mm bore size is a common specification for these performance engines, and the -14.00 CC dish volume is designed to work with specific compression ratios, which is crucial for tuning and power output. If you're aiming for more power from your WRX or STi, starting with a strong set of pistons like these is essential.

Manley uses proven cam and barrel skirt profiles on these pistons. This design helps them generate substantial power while also being considerate of your cylinder walls during operation, which can extend engine life. They also pay close attention to the ring lands and grooves, machining them to strict standards. This ensures a better seal from your piston rings, which directly translates to more power and better engine efficiency. The unique fixturing Manley employs allows them to machine the skirt and ring grooves in one operation, ensuring they are perfectly square to each other for optimal ring seal.

Included with this set are premium chrome moly wrist pins, known for their durability. For those pushing the limits even further, Manley offers upgrades to even stronger alloys. When you're building a high-performance engine, the details matter, and Manley addresses them with these pistons. Please note that these pistons are not CARB approved and cannot be shipped to California.