What material are these Mahle pistons made from?

These Mahle MS pistons are constructed from 4032 aluminum. This alloy is chosen for its strength and durability, making it well-suited for high-performance engine applications.

What is the compression ratio achieved with these pistons?

With a piston dish volume of -19.3cc, these pistons help achieve a compression ratio of 8.5:1 when installed in the appropriate engine configuration.

Are these pistons compatible with all Subaru EJ25 engines?

These pistons are designed for Subaru EJ25 engines, specifically for applications requiring a 99.50mm bore. It's important to verify your engine's specifications and consult with a professional to ensure compatibility with your specific build.

Mahle EJ25 Piston Set 99.50mm Bore 930285017T

Name: Mahle MS Piston Set EJ25 99.50mm Bore 79.0mm Stroke 130.5mm Rod 23mm Pin -19.3cc 8.5 CR Set of 4
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-ej25-99-50mm-bore-79-0mm-stroke-130-5mm-rod-23mm-pin-1-t14-371497
Price: 771.93 USD
Availability: BackOrder

Mahle MS Piston Set EJ25 99.50mm Bore 79.0mm Stroke 130.5mm Rod 23mm Pin -19.3cc 8.5 CR Set of 4

$771.93

On Backorder

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

Mahle MS Piston Set for EJ25 engines. 99.50mm bore, 8.5 CR. Set of 4.

Key Features

Set of 4 Mahle MS pistons for Subaru EJ25 engines.
Features a 99.50mm bore and 79.0mm stroke.
Designed for a 130.5mm rod and a 23mm wrist pin.
Piston dish volume is -19.3cc, resulting in an 8.5:1 compression ratio.
Constructed from 4032 aluminum for strength and durability.
Includes TBC coating for reduced friction and improved wear resistance.

This piston set is designed for Subaru EJ25 engines, commonly found in models like the WRX, Forester, and Legacy.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Product Details

Mahle is a well-known name in engine components, supplying parts to many major automakers. They are recognized for their expertise in piston technology, and this MS Piston Set for the Subaru EJ25 engine is a prime example of their commitment to performance and reliability. If you're rebuilding the heart of your Subaru WRX, Forester, or Legacy with the 2.5L engine, these pistons are built to handle the demands of a performance build.

This set features pistons with a 99.50mm bore and a 79.0mm stroke, designed to work with a 130.5mm rod and a 23mm pin. The dish volume is -19.3cc, which helps achieve a compression ratio of 8.5:1. These pistons are constructed from 4032 aluminum, a material known for its strength and durability, making it suitable for high-performance applications. They also come with a TBC coating, which helps reduce friction and improve wear resistance, contributing to a longer engine life and improved efficiency.

This set includes four pistons, enough for a complete engine rebuild. Please note that these pistons are not CARB approved and cannot be shipped to California. It's always recommended to consult your engine builder or a professional mechanic for specific installation procedures and compatibility with other engine components.