What is included in this piston set?

This set includes four Manley Performance forged pistons. Each piston is 100.00mm in bore size and comes with a tool steel wrist pin and moly skirt coating.

What material are these pistons made from?

These pistons are forged from domestic 2618 alloy, which is known for its superior strength and performance characteristics, making them suitable for high-output engines.

Are these pistons compatible with all Subaru WRX STi models with a 2.5L engine?

This piston set is specifically designed for the EJ257 engine found in certain Subaru WRX STi models. It is not CARB approved and cannot be shipped to California. Always verify fitment for your specific vehicle year and model.

Specifications

Brand: Manley Performance
Part #: 652305C-4
UPC: 807298116563

Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.209in CH, -10.00 CC

Name: Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.209in CH, -10.00 CC
Brand: Manley Performance
SKU: manley-performance-manley-subaru-2-5l-ej257-wrx-sti-piston-set-100-00mm-bore-1-2-t14-880123
Price: 827.84 USD
Availability: BackOrder

$827.84

On Backorder

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Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.209in CH, -10.00 CC. Forged from 2618 alloy for superior strength.

Key Features

Fits Subaru 2.5L EJ257 engines.
Set includes four forged pistons with a 100.00mm bore.
Features a 1.209-inch compression height and -10.00cc dish volume.
Constructed from domestic 2618 alloy forgings for superior strength.
Includes tool steel wrist pins and moly skirt coatings.
Designed with cam and barrel skirt profiles for power and cylinder wall protection.

This piston set is designed for the Subaru 2.5L EJ257 engine. Always confirm compatibility with your specific vehicle application.

⚠️ 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

This is a set of Manley Performance forged pistons designed for the Subaru 2.5L EJ257 engine. You get four pistons, each with a 100.00mm bore size, a 1.209-inch compression height, and a -10.00cc dish volume. These pistons are built using Manley's signature "Platinum Series" construction, featuring domestic 2618 alloy forgings for enhanced strength and durability. They also include tool steel wrist pins and a moly skirt coating to help reduce friction and wear.

Manley has engineered these pistons with proven cam and barrel skirt profiles, which help generate power while being gentle on your cylinder walls. The ring lands and grooves are machined to strict standards, promoting a better ring seal for improved engine performance. Their unique fixturing process ensures the ring grooves are perfectly square to the skirt, a detail that matters for consistent engine operation. These are the same types of pistons relied upon by professional engine builders and tuners for demanding applications.

When rebuilding or upgrading your EJ257 engine, these pistons are a solid choice for their robust construction and thoughtful design. Please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.