What does '.040 undersize' mean for these pistons?

This means the pistons are manufactured to be 0.040 inches smaller in diameter than the standard bore size. They are intended for use when the engine cylinders have been bored out to match this specific dimension during an engine rebuild.

Are the piston rings included with this set?

Yes, these Mahle OE pistons come with the piston rings already mounted. The set also includes the necessary piston pins and clips for a complete and convenient engine rebuild.

What is the significance of the 17.1:1 CR designation?

This refers to the compression ratio the pistons are designed for, which is 17.1:1. This specific ratio is found in the 05-HO (High Output) version of the Cummins B 5.9L engine, often identified by a 'C' in the vehicle's VIN.

2005-2009 Dodge Ram 2500 Piston Set

Name: Mahle OE Cummins B 5.9L .040 05-HO 17.1:1 CR Vin C Eng ETH Piston With Rings Set (Set of 6)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-cummins-b-5-9l-040-05-ho-17-1-1-cr-vin-c-eng-eth-piston-with-r-t14-53010
Price: 908.36 USD
Availability: InStock

Mahle OE Cummins B 5.9L .040 05-HO 17.1:1 CR Vin C Eng ETH Piston With Rings Set (Set of 6)

$908.36

Only 1 left in stock

Fits 2005-2009 Dodge Ram 2500. Mahle OE Cummins B 5.9L pistons (.040 undersize) with rings, pin, and clips included for a convenient rebuild.

Key Features

Fits 2005-2009 Dodge Ram 2500 and 2005-2009 Dodge Ram 3500.
Set of 6 Mahle OE pistons for the Cummins B 5.9L engine.
Pistons are .040 inch undersize for bored cylinders.
Features compensated ring grooves for proper ring loading and oil control.
Expansion-controlled design reduces engine noise, wear, and emissions.
Includes mounted piston rings, pins, and clips for a convenient installation.

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Product Details

Mahle is one of the largest original equipment piston manufacturers globally, known for making parts that meet the exact specifications of your vehicle. If you're rebuilding the engine in your 2005-2009 Dodge Ram 2500 with the Cummins B 5.9L engine, this set of six Mahle OE pistons is ready to go right into your build. These pistons are .040 inch undersize, meaning they are designed to fit cylinders that have been bored out to that specific dimension during an engine rebuild.

These pistons come with compensated ring grooves, which help ensure the piston rings are properly loaded and maintain good oil control. They also feature expansion-controlled designs. This means they're built with tight fitting clearances, which helps reduce engine noise, wear, and emissions, while also improving oil control. For your convenience, these pistons come with the piston rings already mounted, and the necessary pins and clips are also included, so you can get straight to work on your engine assembly.

This set is designed for the 17.1:1 compression ratio found in the 05-HO (High Output) Cummins B 5.9L engine, identified by a 'C' in the VIN. Please note that these pistons are not CARB approved and cannot be shipped to California.