Mahle Motorsport GM 6.6L Duramax Piston Set 4.075 in. Bore 16.5:1 Valve Pockets
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Regular price
$1,932.52
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This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.
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Compliance & Restrictions
California Proposition 65 (Prop 65)
WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer and/or reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
CARB / California Emissions Compliance
This item may be restricted in California and other regions with emissions regulations. If applicable, it is intended for
competition/off-road use only unless otherwise stated. It is the customer’s responsibility to confirm local compliance before purchase.
Orders shipping to restricted areas may be canceled.
A set of eight pistons from Mahle Motorsport for the 6.6L Duramax, machined to 4.075 in. with a -41.8cc crown volume and a 16.5:1 compression ratio.
Key Features
- M142 cast performance piston with a coated skirt
- Bore: 4.075 in. | Stroke: 3.898 in. | Rod: 6.417 in
- Crown volume -41.8cc for a 16.5:1 compression ratio
- Compression height 1.951 in., reduced 0.010 in. from stock
- Revised casting with improved crown geometry and a performance bowl design
- 0.075 in. deep valve pockets for added valve clearance
- 4075MDK-D ring set included
- Listed weight: 877 grams each
- Sold as a set of eight pistons
Fitment
- GM 6.6L Duramax V8 diesel, LB7, LLY, LBZ, LMM, LGH and LML engine codes (2001-2016)
- 4.075 in. bore
Product Details
- Manufacturer Part Number: 930029875
- Brand: Mahle Motorsport
- Bore: 4.075 in
- Stroke: 3.898 in
- Rod length: 6.417 in
- Compression height: 1.951 in
- Pin diameter: 1.358 in
- Crown volume: -41.8cc
- Compression ratio: 16.5:1
- Valve pockets: 0.075 in. deep
- Alloy: M142
- Weight: 877 grams
- Ring set: 4075MDK-D included
- Quantity: Set of 8
- Compression ratio calculated with 0.012 in. piston protrusion above deck and a 0.037 x 4.115 in. head gasket
Shipping Height: 9.3
Shipping Length: 13.6
Shipping Width: 11.6