What material are these pistons made from and why is it important?

These pistons are forged from 2618 aluminum, which is chosen for its improved tensile strength. This makes them well-suited for the high stresses encountered in performance and racing applications.

What is the ArmorGlide skirt coating and what does it do?

ArmorGlide is a skirt coating applied to these pistons that helps reduce friction and noise during operation. It also provides seizure resistance, which is important for engine longevity under demanding conditions.

Are these pistons compatible with all EJ257 engines?

This specific kit is designed for the 2004-2012 Subaru Impreza. It's important to confirm your specific engine code and vehicle year to ensure proper fitment for your build.

2004-2012 Subaru Impreza Piston Set | Wiseco K598M9975

Name: Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 99.75 Piston Shelf Stock Kit
Brand: Wiseco
SKU: wiseco-wiseco-subaru-ej257-wrx-sti-4v-dish-19cc-99-75-piston-shelf-stock-kit-t14-489128
Price: 732.99 USD
Availability: InStock

Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 99.75 Piston Shelf Stock Kit

$732.99

Only 4 left in stock

Fits 2004-2012 Subaru Impreza. Wiseco forged piston set for serious builds, made from 2618 aluminum with ArmorGlide skirt coating.

Key Features

Fits 2004-2012 Subaru Impreza.
Forged in the USA from 2618 aluminum for improved tensile strength.
99.75 mm bore size with a -19cc dish volume.
Features precision ring grooves, anti-detonation grooves, and improved ring seal features.
ArmorGlide skirt coating reduces friction, noise, and resists seizure.
Fully machined crown and forced pin oiling for enhanced lubrication.

⚠️ 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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Product Details

Starting with a 2618 aluminum forging, these Wiseco pistons are machined in the USA for your Subaru EJ257 engine. This material choice is key because it offers improved tensile strength, which is crucial when you're pushing your engine hard. The 99.75mm bore size is a common upgrade for rebuilding or enhancing the EJ257, and these are designed as a shelf stock kit, meaning they're ready to go for many builds.

Wiseco has packed these pistons with features for durability and performance. You'll find precision ring grooves, an anti-detonation groove, and other features designed to improve ring seal. The crown is fully machined, and they even include forced pin oiling to keep things well-lubricated under stress. Plus, the ArmorGlide skirt coating helps reduce friction and noise, while also resisting seizure – important for keeping your engine running smoothly during demanding use.

This set of four pistons is built to withstand heavy to severe duty performance applications. While these are designed for serious racers and builders, the attention to detail in their construction means they're a solid option for anyone looking to rebuild or significantly upgrade their EJ257 engine. Keep in mind these are not CARB approved and cannot be shipped to California.