What is the primary material used for these pistons?

These Mahle OE pistons are constructed from a specific cast aluminum alloy. This material is chosen to provide a good balance between the strength needed for diesel engine operation and a reduced weight.

Are these pistons suitable for all Cummins B 5.9L engines?

This piston set is designed for Cummins B 5.9L L6 diesel engines that are equipped with a Piston Cooling (PC) system. It is important to verify your engine's configuration before purchasing.

What does 'standard size' mean for these pistons?

Standard size pistons are manufactured to the original factory bore diameter for the engine. This ensures a direct fit without the need for boring the cylinders, assuming the existing cylinders are in good condition.

Mahle OE Cummins B 5.9L Piston Set 2243520

Name: Mahle OE Cummins B 5.9L L6 STD w/ PC Eng Set Piston Set (Set of 6)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-cummins-b-5-9l-l6-std-w-pc-eng-set-piston-set-set-of-6-t14-53592
Price: 585.27 USD
Availability: BackOrder

Mahle OE Cummins B 5.9L L6 STD w/ PC Eng Set Piston Set (Set of 6)

$585.27

On Backorder

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

Mahle OE Cummins B 5.9L L6 STD w/ PC Eng Set Piston Set (Set of 6). Direct fit for your diesel engine.

Key Features

Fits Cummins B 5.9L L6 diesel engines.
Set includes six standard-size pistons.
Constructed from a specific cast aluminum alloy for strength and reduced weight.
Features precisely machined ring grooves for optimal sealing.
Piston skirts are designed with a specific profile to reduce friction and noise.
Intended for engines equipped with Piston Cooling (PC) systems.

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Product Details

Mahle OE pistons for the Cummins B 5.9L L6 diesel engine are built with a specific cast aluminum alloy that balances strength and weight. This set includes six standard-size pistons, each featuring a precisely machined ring groove for optimal sealing and oil control. The piston skirts are designed with a specific profile to reduce friction and noise during operation, contributing to a smoother running engine. These pistons are intended for use in engines equipped with PC (Piston Cooling) systems, ensuring proper lubrication and heat dissipation for longevity.

When you're rebuilding the top end of your Cummins B 5.9L, using pistons that meet original equipment specifications is crucial for reliable performance. Mahle OE pistons are manufactured to the same exacting standards as the parts that came with your truck from the factory. This means you can expect a direct fit without modifications, and the assurance that they will perform as intended. The cast aluminum construction is well-suited for the high-pressure environment of a diesel engine, offering a solid balance of durability and reduced reciprocating mass compared to heavier forged pistons. This can contribute to improved engine response and overall efficiency.

This set includes all six pistons needed for a complete engine overhaul. It's important to note 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 break-in procedures to ensure the best performance and lifespan from your new Mahle OE pistons.