What is included in this piston set?

This set includes four Manley Extreme Duty pistons, each with a 100.0mm bore and a +.50mm size. It also includes the standard premium Chrome Moly wrist pins for each piston.

What is the compression ratio of these pistons?

These pistons feature an 8.5:1 compression dish. This ratio is suitable for many boosted engine builds where controlled compression is desired.

Can this piston set be shipped to California?

No, this piston set is not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 632205CE-4
UPC: 807298088136

Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Extreme Duty Piston Set

Name: Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Extreme Duty Piston Set
Brand: Manley Performance
SKU: manley-performance-manley-04-subaru-wrx-sti-eh257-100-0mm-bore-50mm-size-8-5-1-d-t14-4387157
Price: 963.51 USD
Availability: InStock

$963.51

Only 1 left in stock

Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Extreme Duty Piston Set. These forged pistons are built for serious performance.

Key Features

Fits 2004 and newer Subaru WRX and STI models.
Includes four forged pistons with a 100.0mm bore size and a +.50mm size.
Features an 8.5:1 compression dish.
Constructed from domestic 2618 alloy forgings for strength.
Comes standard with premium Chrome Moly wrist pins.
Piston skirt profiles are designed for power and cylinder wall protection.

This piston set is designed for 2004 and newer Subaru WRX and STI models. Please verify compatibility with your specific vehicle's engine configuration.

⚠️ 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

When you're rebuilding the heart of your 04+ Subaru WRX or STI, you want parts you can trust. This Extreme Duty Piston Set from Manley Performance is built for just that. You get four forged pistons, each measuring 100.0mm in bore size and designed with a +.50mm size to account for machining. They feature an 8.5:1 compression dish, making them a solid choice for boosted applications where you need reliable power.

Manley uses their signature 2618 alloy forgings, which are known for being strong and performing well under pressure. These pistons also come with premium Chrome Moly wrist pins for added durability, and the skirt profiles are carefully shaped to help generate power while being easy on your cylinder walls. The ring lands and grooves are machined to strict standards, which helps ensure a good seal for better power output. Manley's unique machining process ensures the ring grooves are perfectly square to the piston skirt, a detail that matters for consistent performance.

This set is not CARB approved and cannot be shipped to California. If you're looking to build a robust engine for your WRX or STI, these pistons are a popular choice among professional engine builders for their durability and performance.