What material are these Mahle pistons made from?

These Mahle MS pistons are constructed from 4032 aluminum. This material is chosen for its good balance of strength, durability under high temperatures and pressures, and lighter weight compared to cast iron.

What is the compression ratio achieved with these pistons?

With a -11cc dish volume, these pistons contribute to an 11.3:1 compression ratio when used with the appropriate cylinder head and gasket for the BMW S52 engine.

Are these pistons compatible with all BMW S52 engines?

This piston set is specifically designed for the BMW S52 3.2L engine. It is important to verify that your engine application matches the specifications, including bore, stroke, rod length, and pin diameter, before installation.

Mahle S52B Piston Set 86.60mm Bore 930024409

Name: Mahle MS Piston Set BMW S52B 86.60mm Bore 89.6mm Stroke 135mm Rod 22mm Pin -11cc 11.3 CR Set of 6
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-bmw-s52b-86-60mm-bore-89-6mm-stroke-135mm-rod-22mm-pin-t14-191463
Price: 1085.79 USD
Availability: BackOrder

Mahle MS Piston Set BMW S52B 86.60mm Bore 89.6mm Stroke 135mm Rod 22mm Pin -11cc 11.3 CR Set of 6

$1085.79

On Backorder — Expected to ship by May 2, 2026

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 S52B 3.2L engines. Features 86.60mm bore and 11.3:1 compression ratio.

Key Features

Fits BMW S52 3.2L engines.
Set includes six forged pistons.
Each piston has an 86.60mm bore diameter.
Designed for a 135mm rod length and a 22mm pin.
Features a -11cc dish volume for an 11.3:1 compression ratio.
Constructed from 4032 aluminum for durability and lighter weight.

This piston set is designed for the BMW S52 3.2L engine. 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 BMW S52 3.2L, this Mahle MS Piston Set is a solid choice for getting your top end back in shape. These pistons are specifically made for the S52 engine, ensuring they'll work correctly with your existing components when you're putting the engine back together. Mahle is a well-known name in engine parts, and this set is built to handle the demands of a performance engine build.

This set includes six pistons, each measuring 86.60mm in bore diameter. They are designed with a 135mm rod length and a 22mm pin size, which are key dimensions for proper engine assembly and function. The pistons feature a -11cc dish volume, contributing to an 11.3:1 compression ratio when paired with the correct cylinder head and gasket. The material used is 4032 aluminum, a common choice for performance pistons because it offers a good balance of strength and lighter weight compared to cast iron, and it's known for its durability under higher temperatures and pressures. Each piston weighs in at 324 grams, which helps maintain good rotating assembly balance.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're planning a high-performance build or a complete engine overhaul, this Mahle piston set offers the specific dimensions and material properties needed for a successful rebuild of your S52 engine.