What is the compression ratio with these pistons?

These pistons feature a -54.5cc dish volume which results in a 14.8:1 compression ratio when installed in the specified Cummins 5.9L 12V engine.

Are these pistons suitable for a stock rebuild or an upgrade?

These are cast performance pistons designed for the Cummins 5.9L 12V engine. They offer a solid foundation for both stock rebuilds and performance-oriented upgrades, providing reliable operation.

Can these pistons be shipped to California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle Cummins Piston Set 197952315 - 5.9L 12V

Name: Mahle MS Piston Set Cummins 4.015in Bore 4.724in Stroke 7.559od 1.575 Pin -54.5cc 14.8 CR Set of 6
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-cummins-4-015in-bore-4-724in-stroke-7-559od-1-575-pin--t14-582981
Price: 1091.64 USD
Availability: BackOrder

Mahle MS Piston Set Cummins 4.015in Bore 4.724in Stroke 7.559od 1.575 Pin -54.5cc 14.8 CR Set of 6

$1091.64

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 Cummins 4.015in Bore 4.724in Stroke 7.559od 1.575 Pin -54.5cc 14.8 CR Set of 6. Built for Cummins 5.9L 12V engines.

Key Features

Fits Cummins 5.9L 12V 359 cu in. engines.
Set includes six cast performance pistons.
Piston bore is 4.015 inches.
Features a -54.5cc dish volume for a 14.8:1 compression ratio.
Stroke is 4.724 inches with a 7.559 inch rod length.
Pin diameter is 1.575 inches.

This piston set is designed for the Cummins 5.9L 12V 359 cu in. engine. Please verify compatibility with your specific vehicle or application.

⚠️ 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

Mahle is a well-known name in engine components, particularly for their work with diesel engines. This piston set is built for the Cummins 5.9L 12V B-Series engine, a workhorse found in many trucks and industrial applications. These cast performance pistons are designed to handle the demands of a rebuilt or upgraded engine, offering a solid foundation for your build.

This set includes six pistons, each featuring a 4.015-inch bore and a -54.5cc dish volume, which contributes to a 14.8:1 compression ratio. The stroke is 4.724 inches, and the rod length is 7.559 inches, with a 1.575-inch pin diameter. These specifications are crucial for ensuring proper engine geometry and performance when you're rebuilding your top end. The pistons themselves weigh 1132g, indicating a robust construction suitable for performance applications.

When undertaking a diesel engine rebuild, especially for a Cummins 5.9L 12V, using well-made internal components like these Mahle pistons is essential. They are designed to fit right and perform reliably. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitting and assembly procedures.