What does '.020 undersize' mean for these pistons?

An '.020 undersize' piston is slightly smaller in diameter than a standard piston. This is typically used when cylinder walls have been honed or bored out to remove wear or damage, ensuring a proper fit and seal within the slightly larger cylinder bore.

Does this set include everything needed for installation?

Yes, this set includes four pistons with the piston rings already mounted, along with the necessary piston pins and clips. This makes them ready for installation right out of the box for your engine rebuild.

Are these pistons suitable for all 6.6L Duramax engines?

This specific set is designed for the 2006-2009 LMM and LBZ Duramax engines with VIN code 26D, and also fits 2010 models. It is for the right bank only and is .020 undersize. Always verify your specific engine and VIN code to ensure compatibility.

Mahle OE GM 6.6L Duramax Piston Set 2243708WR020

Name: Mahle OE GM 6.6L Duramax 06-09 LMM LBZVin 26D .020 Right Bank Only Piston With Rings Set (Set of 4)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-gm-6-6l-duramax-06-09-lmm-lbzvin-26d-020-right-bank-only-pisto-t14-52904
Price: 590.35 USD
Availability: InStock

Mahle OE GM 6.6L Duramax 06-09 LMM LBZVin 26D .020 Right Bank Only Piston With Rings Set (Set of 4)

$590.35

Only 2 left in stock

Mahle OE GM 6.6L Duramax .020 right bank piston and ring set for 2006-2010 trucks. Includes pre-mounted rings for easier installation.

Key Features

Fits 2006-2010 Chevrolet and GMC 6.6L Duramax diesel trucks.
This is a .020 inch undersize piston set for the right bank only.
Features compensated ring grooves for proper ring loading and oil control.
Expansion-controlled designs reduce engine noise and wear.
Pistons come with pre-mounted rings, pin, and clips for easier installation.
OE quality from Mahle, a leading original equipment piston manufacturer.

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Will this fit your vehicle?

Product Details

These Mahle OE pistons are built to the original equipment specifications for GM 6.6L Duramax diesel engines from 2006-2009, specifically for the LMM and LBZ variants with the VIN code 26D. This set is for the right bank only and features a .020 inch undersize, meaning they are slightly smaller than standard to account for wear or for a specific build requirement. Mahle is a major OE supplier, so you're getting pistons that match the factory design and performance characteristics.

What sets these pistons apart is their compensated ring grooves, which ensure the piston rings load correctly and maintain proper oil control. They also incorporate expansion-controlled designs, allowing for tight clearances when the engine is cold. This reduces engine noise, minimizes wear, helps control emissions, and further improves oil management. Mahle makes installation convenient by including the piston rings already mounted on the pistons, along with the necessary pins and clips. This means they are ready to go right out of the box, saving you time and effort during your engine rebuild.

This set includes four pistons, designed specifically for the right bank of your Duramax engine. If you're rebuilding your top end and need reliable, OE-quality components, these Mahle pistons are a solid choice. They are designed to fit a range of GM trucks, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD, ensuring you get the right part for your specific application.