What material are these Mahle pistons made from?

These Mahle MS pistons are constructed from 4032 aluminum. This material is chosen for its balance of strength and thermal expansion properties, making it suitable for high-performance engine applications.

What is the compression ratio and dish volume for these pistons?

This piston set features a 12.2:1 compression ratio and a 12.2cc dish volume. These specifications are designed to work with the BMW S85 B50 engine's cylinder head for optimal performance.

Are these pistons compatible with all BMW S85 engines?

This piston set is specifically designed for the BMW S85 B50 5.0L V10 engine. It is important to verify your engine code to ensure proper fitment. Note that these are not CARB approved and cannot ship to California.

Mahle S85 Piston Set 197859622 - BMW S85 B50

Name: Mahle MS Piston Set BMW S85 B50 92mm Bore 75.2mm Stroke 140.7mm Rod 21mm Pin 12.2cc 12.2CR Set of 6
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-bmw-s85-b50-92mm-bore-75-2mm-stroke-140-7mm-rod-21mm-p-t14-353442
Price: 1782.71 USD
Availability: BackOrder

Mahle MS Piston Set BMW S85 B50 92mm Bore 75.2mm Stroke 140.7mm Rod 21mm Pin 12.2cc 12.2CR Set of 6

$1782.71

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 BMW S85 B50 5.0L V10 engines. 92mm bore, 75.2mm stroke, 12.2cc dish volume, 12.2:1 CR. Part# 197859622.

Key Features

Fits BMW S85 B50 5.0L V10 engines.
Constructed from 4032 aluminum for strength and thermal stability.
92.00mm bore diameter.
Designed for a 75.2mm stroke and 140.7mm connecting rod.
Features a 21mm wrist pin.
12.2cc dish volume and 12.2:1 compression ratio.

This piston set is specifically designed for the BMW S85 B50 5.0L V10 engine. It is not compatible with other engine variants or vehicle makes.

⚠️ 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 heart of your BMW S85 B50 V10 engine, Mahle's MS Piston Set is a well-built option designed for performance and durability. This set is specifically engineered for the S85 engine, known for its high-revving nature and complex design. These pistons are crafted from 4032 aluminum, a material chosen for its strength and resistance to thermal expansion, which is crucial for maintaining proper clearances at operating temperatures. Each piston measures 92.00mm in bore diameter, features a 75.2mm stroke compatibility, and uses a 140.7mm connecting rod with a 21mm wrist pin. The 12.2cc dish volume and 12.2:1 compression ratio are carefully calculated to work with the S85's cylinder head design, aiming for improved power output while maintaining reliability.

Mahle has a long-standing reputation for producing high-performance engine components, and this piston set reflects that expertise. The pistons weigh in at 366 grams each, a figure that balances strength with the need to keep reciprocating mass as low as possible for optimal engine response and longevity. The 4032 aluminum construction offers a good compromise between the thermal stability of 230 aluminum and the strength of 4032, making it a popular choice for high-performance street and track applications. This set includes all six pistons needed for a complete engine rebuild, ensuring uniformity across all cylinders. Remember that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and torque specifications.