What is the significance of the .040 inch sizing?

The .040 inch sizing indicates that these pistons are slightly smaller than the standard bore size. This is common when an engine has been previously rebuilt and the cylinders have been bored out to a larger diameter. Always confirm your engine's bore size before ordering.

Does this set include everything needed to install the pistons?

Yes, this set comes with four pistons, each fitted with piston rings, along with the necessary wrist pins and clips. This provides a convenient, ready-to-install package for your engine rebuild.

What does 'left bank only' mean for this piston set?

'Left bank only' means these pistons are intended for the driver's side of the engine. The engine's V-configuration requires separate sets for each bank, so ensure you order the correct set for your specific needs.

Mahle OE GM 6.6L Duramax Piston Set 2243709WR040

Name: Mahle OE GM 6.6L Duramax 06-09 LMM LBZ Vin 26D .040 Left Bank Only Piston With Rings Set (Set of 4)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-gm-6-6l-duramax-06-09-lmm-lbz-vin-26d-040-left-bank-only-pisto-t14-52902
Price: 597.93 USD
Availability: BackOrder

Mahle OE GM 6.6L Duramax 06-09 LMM LBZ Vin 26D .040 Left Bank Only Piston With Rings Set (Set of 4)

$597.93

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 GM 6.6L Duramax 06-09 LMM LBZ Vin 26D .040 Left Bank Only Piston With Rings Set (Set of 4)

Key Features

Fits 2006-2010 Chevrolet and GMC 2500/3500 HD trucks and vans with the 6.6L Duramax LMM/LBZ VIN 26D engine.
Set includes four pistons, pre-mounted piston rings, wrist pins, and clips for the left bank.
Pistons are .040 inch undersize, suitable for engines that have been bored.
Features compensated ring grooves for proper ring loading and oil control.
Expansion-controlled design reduces engine noise, wear, and emissions.
OE quality from Mahle, a leading original equipment piston manufacturer.

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Will this fit your vehicle?

Product Details

Mahle is a major OE piston manufacturer, known for producing parts that meet original equipment specifications. This piston and ring set is designed for GM 6.6L Duramax diesel engines, specifically the LMM and LBZ variants from 2006-2009 with the VIN code 26D. This set is for the left bank (driver's side) and features a .040 inch undersize bore, making it suitable for engines that have been previously bored out. It includes four pistons, each with pre-mounted piston rings, along with the necessary wrist pins and clips, so you have everything ready for installation.

These pistons are built with OE features like compensated ring grooves. This design helps ensure proper ring loading and effective oil control, which is crucial for diesel engine longevity and performance. The expansion-controlled design also means the pistons have small fitting clearances. This helps reduce engine noise, minimize wear, control emissions, and further improve oil management. Having the rings, pins, and clips included means less time sourcing individual components and a more straightforward rebuild process.

This set is a solid option for rebuilding the top end of your 6.6L Duramax. It's important to note that this set is specifically for the left bank of the engine and is .040 inches undersize. Always confirm your engine's bore size and bank requirements before ordering to ensure you get the correct parts for your rebuild.