Mahle 930036075 Duramax Performance Cast Pistons .020 Over for GM 6.6L

Vehicle Fitment

• GM 6.6L Duramax V8 Diesel engines (LB7, LLY, LBZ, LMM, LML)
• Used in Chevrolet Silverado 2500/3500 & GMC Sierra 2500/3500 (2001-2016)

Features

• Performance cast piston set designed for Duramax diesel applications
• .020" over standard bore for cylinders bored to 4.075 in
• Cast aluminum M142 alloy for strength with manageable weight
• Machined from OE-derived castings retaining cast iron ring land
• Grafal coated skirts reduce friction and improve scuff resistance
• Lower compression design (≈16.8:1) supports performance tuning
• Dish piston crown for combustion efficiency in diesel applications
• Pistons include rings, pins, and clips for a complete rebuild kit

Specifications

• Part Number: 930036075
• Engine: GM 6.6L Duramax V8 Diesel
• Bore Size: 4.075 in (+0.020 over standard)
• Rod Length: 6.417 in
• Stroke: 3.898 in
• Compression Height: ~1.956 in
• Compression Ratio: ~16.8:1 with dish crown
• Piston Material: Cast aluminum M142

Included Components

• 8x Pistons (cast, .020 over)
• 8x Piston rings pre-installed
• 8x Wrist pins
• 16x Pin clips/retainers

Product Description

The Mahle 930036075 Duramax Performance Cast Piston Kit is engineered for GM 6.6L Duramax diesel engines when the block is bored .020" oversize (4.075 in). This performance piston set uses cast aluminum M142 alloy and advanced design features that improve durability under high-pressure diesel conditions while retaining a manageable weight. Skirts are coated with Mahle's Grafal dry film lubricant to reduce friction and improve resistance to scuffing, and the dished crown design creates a lower compression ratio suitable for high output tuning and performance upgrades.

Ideal for engine rebuilds, overhauls, and performance projects where additional displacement and durability are needed, this complete kit comes with all required rings, wrist pins, and retainers. It fits commonly on models like Chevrolet Silverado and GMC Sierra HD trucks equipped with LB7, LLY, LBZ, LMM, and LML Duramax engines from 2001 through 2016. Always confirm your engine's bore size and machining requirements before installation.