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 characteristics, making it well-suited for high-output engines.

What is included with this piston set?

This product is a set of four Manley Extreme Duty pistons. It also includes premium chrome moly wrist pins for each piston.

Are these pistons compatible with all Subaru WRX/STi models from 2004 onwards?

These pistons are designed for 2004 and later Subaru WRX and STi models. However, they are not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 632305CE-4
UPC: 807298105512

Manley 04+ Subaru WRX/STi EH257 100.0mm +.50mm Bore 9.8:1 Dish Extreme Duty Piston Set of 4

Name: Manley 04+ Subaru WRX/STi EH257 100.0mm +.50mm Bore 9.8:1 Dish Extreme Duty Piston Set of 4
Brand: Manley Performance
SKU: manley-performance-manley-04-subaru-wrx-sti-eh257-100-0mm-50mm-bore-9-8-1-dish-e-t14-4378697
Price: 963.51 USD
Availability: BackOrder

$963.51

On Backorder

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

Manley Extreme Duty piston set for 04+ Subaru WRX/STi. Features 2618 alloy forgings for superior strength.

Key Features

Fits 2004 and later Subaru WRX and STi models.
Set includes four Extreme Duty pistons.
Features a 100.0mm bore size.
Includes a 9.8:1 compression dish.
Constructed from domestic 2618 alloy forgings for superior strength.
Includes premium chrome moly wrist pins.

This piston set is designed for 2004 and later Subaru WRX and STi models. 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

This is a set of four Manley Extreme Duty pistons, designed for 2004 and later Subaru WRX and STi models. These pistons feature a 100.0mm bore and a 9.8:1 compression dish, built with Manley's signature "Platinum Series" construction. They utilize domestic 2618 alloy forgings, which are known for their exceptional strength and performance under demanding conditions.

Manley builds these pistons with proven cam and barrel skirt profiles, which help generate substantial power while also being gentle on your cylinder walls. The ring lands and grooves are machined to exacting standards, ensuring a better ring seal and ultimately more power from your engine. Each set includes premium chrome moly wrist pins, and Manley's unique fixturing process allows for skirt turning and ring groove machining in a single operation. This ensures ultimate squareness between the ring groove and the skirt, contributing to overall engine reliability and performance.

This piston set is not CARB approved and cannot be shipped to California. If you're rebuilding the top end of your Subaru's engine for increased performance or durability, these pistons are a solid option from a well-known manufacturer in the performance engine building world.