What material are these pistons made from?

These Mahle pistons are constructed from 2618 aluminum. This material is known for its strength and ability to handle the high temperatures and pressures found in performance engines.

What is the compression ratio with these pistons?

When used with the specified stroke and rod length, these pistons achieve an 8.5:1 compression ratio due to their -22cc dish volume.

Can these pistons be shipped to California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle EJ25 Piston Set 99.75mm Bore 8.5 CR 930285127

Name: Mahle MS Piston Set EJ25 99.75mm Bore 79.0mm Stroke Stock Rod 23mm Pin -22cc 8.5 CR Set of 4
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-ej25-99-75mm-bore-79-0mm-stroke-stock-rod-23mm-pin-22c-t14-131396
Price: 749.22 USD
Availability: InStock

Mahle MS Piston Set EJ25 99.75mm Bore 79.0mm Stroke Stock Rod 23mm Pin -22cc 8.5 CR Set of 4

$749.22

Only 3 left in stock

Mahle MS Piston Set for Subaru WRX 2.5L. Features a 99.75mm bore and 8.5:1 compression ratio for improved engine performance.

Key Features

Fits Subaru WRX 2.5L engines.
Mahle MS Piston Set with a 99.75mm bore.
Features a 79.0mm stroke and works with stock rods and a 23mm wrist pin.
Piston dish volume is -22cc, resulting in an 8.5:1 compression ratio.
Constructed from strong 2618 aluminum for durability under high loads.
Each piston weighs 413g for balanced engine rotation.

This piston set is designed for Subaru WRX 2.5L engines. Please verify compatibility with your specific vehicle model and year.

⚠️ 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

If you're rebuilding the engine in your Subaru WRX 2.5L, this Mahle MS Piston Set is a solid choice for getting your build back on the road. Mahle is a well-known name in engine components, and this set is built to handle the demands of a performance engine. These pistons are designed with a 99.75mm bore and a 79.0mm stroke, working with stock-length rods and a 23mm wrist pin. They feature a -22cc dish volume, which results in an 8.5:1 compression ratio when used with the specified stroke and rod length.

The pistons themselves are constructed from 2618 aluminum, a material chosen for its strength and ability to withstand high temperatures and pressures common in performance applications. Each piston weighs in at 413g, contributing to a balanced rotating assembly. The included wrist pins are 23mm, which is standard for many performance Subaru applications. This set is designed as a direct replacement for the factory pistons, simplifying installation for a mechanic or a dedicated DIYer. Keep in mind that these pistons are not CARB approved and cannot be shipped to California.