What is the compression height of these pistons?

These Wiseco pistons have a compression height of 32.20mm. This measurement is critical for ensuring the piston sits correctly in the cylinder bore relative to the cylinder head, affecting the engine's compression ratio.

What is the purpose of the ArmorGlide skirt coating?

The ArmorGlide skirt coating on these pistons helps reduce friction between the piston skirt and the cylinder wall. This leads to quieter operation, reduced wear, and improved resistance to seizure under high-stress conditions.

Are these pistons suitable for a stock engine rebuild?

These pistons are designed for heavy to severe duty race builds and performance applications. While they can be used in a rebuild, their robust construction and features are intended for engines that will experience significantly higher stresses than a stock application.

1996-1999 BMW M3 Forged Pistons | Wiseco KE123M87

Name: Wiseco BMW S50B32 87.00mm Bore 32.20mm CH -29cc Piston - Set of 6
Brand: Wiseco
SKU: wiseco-wiseco-bmw-s50b32-87-00mm-bore-32-20mm-ch-29cc-piston-set-of-6-t14-862153
Price: 1144.74 USD
Availability: BackOrder

Wiseco BMW S50B32 87.00mm Bore 32.20mm CH -29cc Piston - Set of 6

$1144.74

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1996-1999 BMW M3. Wiseco forged piston set, 87.00mm bore. Built for severe duty race builds.

Key Features

Fits 1996-1999 BMW M3.
Forged from 2618 aluminum in the USA for improved tensile strength.
87.00mm bore size with a 32.20mm compression height.
Features precision ring grooves, anti-detonation grooves, and improved ring seal.
ArmorGlide skirt coating reduces friction, resists seizure, and quiets operation.
Fully machined crown and forced pin oiling for enhanced durability.

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Product Details

Starting with a 2618 aluminum forging, these Wiseco pistons are built for the demands of serious engine builds. The 87.00mm bore size is specific to the BMW S50B32 engine found in the 1996-1999 M3, and the 32.20mm compression height is matched to the factory configuration.

Wiseco machines these pistons in the USA, incorporating features like precision ring grooves, anti-detonation grooves, and enhanced ring seal designs to ensure reliable performance under heavy stress. The crown is fully machined for accuracy, and forced pin oiling helps keep the wrist pin lubricated. For reduced friction and quieter operation, these pistons also feature an ArmorGlide skirt coating, which is resistant to seizure and helps lower operating temperatures.

This set includes six pistons, designed for severe duty applications where durability and consistent performance are critical. While these are a significant upgrade for a performance build, please note they are not CARB approved and cannot be shipped to California. If you're rebuilding the top end of your S50B32, these pistons offer a well-built foundation for a high-performance engine.