Specifications
- Brand
- Mahle
- Part #
- 930285127-1

Mahle MS Piston Set EJ25 99.75mm Bore 79.0mm Stroke Stock Rod 23mm Pin -22cc 8.5 CR - Single
$171.16
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Mahle MS Piston Set for Subaru EJ25 engines. 99.75mm bore, 8.5 CR.
Key Features
- Fits Subaru WRX 2.5L and other EJ25-powered vehicles.
- Constructed from durable 2618 aluminum.
- Features a 99.75mm bore and 79.0mm stroke.
- Designed for use with stock-length rods and a 23mm wrist pin.
- The -22cc dish volume results in an 8.5:1 compression ratio.
- Each piston weighs 413g for balanced engine performance.
⚠️ 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
Product Details
Crafted from 2618 aluminum, this Mahle MS piston is built for performance in your Subaru EJ25 engine. It features a 99.75mm bore and a 79.0mm stroke, designed to work with stock-length rods and a 23mm wrist pin. The -22cc dish volume contributes to an 8.5:1 compression ratio, making it a solid choice for builds looking for improved power without going too extreme on compression.
Each piston weighs in at 413g, a detail that matters for engine balance and smooth operation at higher RPMs. The 30.7mm compression height and 130.5mm rod length are key measurements that ensure proper fitment and geometry within the EJ25 block. This piston is sold individually, allowing you to purchase exactly what you need for your specific engine rebuild.
Please note that this piston set is not CARB approved and cannot be shipped to California. Always refer to manufacturer installation instructions for proper fitment and assembly procedures.
Specifications
- Brand
- Mahle
- Manufacturer Part #
- 930285127-1
Frequently Asked Questions
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Mahle MS Piston Set EJ25 99.75mm Bore 79.0mm Stroke Stock Rod 23mm Pin -22cc 8.5 CR - Single




