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 capabilities, making it suitable for high-demand engine builds.

Are these pistons suitable for a stock EJ257 engine rebuild?

Yes, these pistons are designed to be a well-built component for rebuilding Subaru 2.5L EJ257 engines. Their construction and profiles are intended to handle performance applications while maintaining good cylinder wall contact.

What is the significance of the -26.00 CC dish volume?

The -26.00 CC dish volume refers to the shape of the piston crown. This specific dish volume affects the engine's compression ratio when paired with your cylinder heads and head gasket thickness.

Specifications

Brand: Manley Performance
Part #: 652405C-4
UPC: 807298116686

Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.130in CH, -26.00 CC

Name: Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.130in CH, -26.00 CC
Brand: Manley Performance
SKU: manley-performance-manley-subaru-2-5l-ej257-wrx-sti-piston-set-100-00mm-bore-1-1-t14-880125
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 - 100.00mm Bore 1.130in CH, -26.00 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 for power generation and cylinder wall protection.
Exacting standards for ring lands and grooves ensure enhanced ring seal and more power.
Includes premium Chrome Moly wrist pins for durability.
Manley's unique fixturing ensures ring groove to skirt squareness.

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 has built a solid reputation among professional engine builders and tuners for making strong, reliable engine components. If you're rebuilding the heart of your Subaru 2.5L EJ257, this set of Manley pistons is a well-built choice designed for serious performance.

These pistons are forged from domestic 2618 alloy, which is known for its superior strength and ability to handle high performance demands. They feature proven cam and barrel skirt profiles that help generate power while also being gentle on your cylinder walls, reducing wear over time. Manley also pays close attention to the details, adhering to strict standards for the ring lands and grooves. This precise machining ensures a better ring seal, which translates directly to more power from your engine. The included wrist pins are made from Chrome Moly, offering good durability for most performance applications.

Manley's unique manufacturing process allows them to machine the skirt and cut the ring grooves in a single operation. This ensures the ring grooves are perfectly square to the piston skirt, which is critical for optimal ring seal and engine longevity. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're looking to build a powerful and durable EJ257 engine, this set of Manley pistons is a solid option.