What is the compression ratio of these pistons?

These Mahle pistons feature a 10.5:1 compression ratio. This is achieved through the -8cc dish volume in each piston, designed to work with the FA20 Turbo engine's specifications.

What material are these pistons made from?

The pistons are made from 2618 aluminum. This is a strong and well-known material in performance engine building, chosen for its ability to handle the heat and pressure found in turbocharged applications.

Are these pistons compatible with all Subaru FA20 engines?

This piston set is specifically for the FA20 TURBO engine. They are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle FA20 Turbo Piston Set 86mm Bore 197769285

Name: Mahle MS Piston Set Subaru FA20 TURBO 86mm Bore 86mm Stroke 129.3mm Rod -8cc 10.5 CR Set of 4
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-subaru-fa20-turbo-86mm-bore-86mm-stroke-129-3mm-rod-8c-t14-120738
Price: 749.22 USD
Availability: BackOrder

Mahle MS Piston Set Subaru FA20 TURBO 86mm Bore 86mm Stroke 129.3mm Rod -8cc 10.5 CR Set of 4

$749.22

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 Subaru FA20 Turbo engines. 86mm bore, 10.5:1 CR. Set of 4.

Key Features

Fits Subaru FA20 Turbo engines.
86mm bore size for a standard performance fit.
10.5:1 compression ratio is ideal for many turbocharged applications.
Constructed from durable 2618 aluminum for high-temperature and high-pressure resistance.
Each piston weighs 320g to help manage rotating mass.
Features a -8cc dish volume for precise compression tuning.

This piston set is designed for Subaru FA20 Turbo engines. It is not CARB approved and cannot be shipped to California.

⚠️ 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 FA20 Turbo, a solid set of pistons is crucial for performance and reliability. This Mahle MS Piston Set is built for that job, featuring an 86mm bore and a 10.5:1 compression ratio, which is a popular choice for many performance builds. These pistons are designed to handle the demands of a turbocharged engine, ensuring your engine can breathe and perform as it should.

Mahle uses 2618 aluminum for these pistons, a strong material known for its durability and ability to withstand high temperatures and pressures common in performance applications. Each piston weighs in at 320g, keeping rotating mass manageable. The -8cc dish volume is specifically calculated to achieve that 10.5:1 compression ratio when paired with the correct cylinder head and gasket combination, making it a well-thought-out component for tuning. The 22mm pin size is standard for many performance applications, and the 129.3mm rod length is also specified for compatibility with the FA20 engine's stroke.

This set includes four pistons, ready for installation. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper assembly and tuning to get the most out of this high-performance component.