What is the advantage of using 2618 alloy forgings?

2618 alloy forgings are chosen for their superior strength and performance characteristics compared to other materials. This makes them well-suited for high-stress engine applications where durability under load is critical.

What does the 93mm bore and 8.5:1 compression ratio mean for my engine?

The 93mm bore is 1mm larger than the stock size, which increases the engine's displacement. The 8.5:1 compression ratio is lower than stock, which is often beneficial for turbocharged engines as it helps prevent detonation under boost and allows for more aggressive tuning.

Are these pistons compatible with all ring sets?

This piston set comes complete with Manley's specifically designed rings and premium chrome moly wrist pins. The ring lands and grooves are machined to exacting standards to ensure an optimal seal with the included components.

Specifications

Brand: Manley Performance
Part #: 620010CE-4
UPC: 807298100005

Manley 98+ Subaru WRX EJ205 93mm +1mm Bore 8.5:1 E/D Dish Piston Set with Rings

Name: Manley 98+ Subaru WRX EJ205 93mm +1mm Bore 8.5:1 E/D Dish Piston Set with Rings
Brand: Manley Performance
SKU: manley-performance-manley-98-subaru-wrx-ej205-93mm-1mm-bore-8-5-1-e-d-dish-pisto-t14-110066
Price: 893.77 USD
Availability: BackOrder

$893.77

On Backorder

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

Manley 98+ Subaru WRX EJ205 93mm +1mm Bore 8.5:1 E/D Dish Piston Set with Rings. Forged 2618 alloy construction for superior strength.

Key Features

Fits 98+ Subaru WRX EJ205.
Forged from domestic 2618 alloy for superior strength and performance.
93mm bore size, which is 1mm over stock.
8.5:1 compression ratio with an E/D dish.
Features Manley's proven cam and barrel skirt profiles for reduced friction and cylinder wall wear.
Exacting standards for piston ring lands and grooves ensure enhanced ring seal.

This piston set is designed for 98+ Subaru WRX models with the EJ205 engine. Please verify fitment for 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

Starting with domestic 2618 alloy forgings, these Manley pistons are built for serious performance in your 98+ Subaru WRX with an EJ205 engine. They're designed with a 93mm bore, which is 1mm over the stock size, and feature an 8.5:1 compression ratio with an E/D dish. This setup is ideal for builders looking to handle increased boost pressure and tune for more power while maintaining good drivability.

Manley's signature cam and barrel skirt profiles are a key feature here. These aren't just round pistons; the skirt shape is carefully engineered to reduce friction and wear on your cylinder walls, even under high loads. Combined with exacting standards for ring lands and grooves, you get an improved ring seal, which translates directly to more power and better engine efficiency. The pistons also come with premium chrome moly wrist pins, and Manley's unique fixturing process ensures the ring grooves are perfectly square to the skirt, a detail that matters for long-term reliability and consistent performance.

This set includes everything you need to get started, with the pistons, rings, and wrist pins all accounted for. Keep in mind these are not CARB approved and cannot be shipped to California. If you're rebuilding your EJ205 top end and aiming for enhanced durability and power, these Manley pistons are a solid choice.