2017-2023 Duramax 6.6L L5P X-Series Pistons (44D101)

Industrial Injection X-Series Premium Piston Kits upgrade your 2017-2023 Duramax 6.6L L5P with diesel pistons engineered for durability, reliability, and high-performance power. Each kit is a true drop-in replacement balanced matched set, complete with rings, wrist pins, and clips, and is available in Standard, .020", and .040" oversized options.

Choose the configuration that fits your build: a Stock replacement for OEM-style rebuilds, or a Coated & De-Lipped kit with a thermal barrier coated, de-lipped piston top for performance builds running increased fuel and boost.

Every kit features a ceramic piston skirt coating that reduces friction, handles loads exceeding 350,000 PSI, and lubricates at temperatures over 1600°F with no piston clearance changes, plus a premium PVD ring pack (certain applications) for harder, smoother ring sealing and longer durability than traditional nitride rings. Coated tops add a thermal barrier coating that keeps heat in the combustion chamber, lowers piston temperature, and improves combustion efficiency for more power.

Stock Pistons

• Drop-in replacement balanced matched set
• Complete with rings, wrist pins, and clips
• Ceramic piston skirt coating for reduced friction
• Premium PVD ring pack for enhanced sealing and durability (certain applications)

Coated & De-Lipped Pistons - Stock features, plus:

• De-lipped piston bowl for added clearance and durability under high cylinder pressure
• Thermal barrier coating on piston tops

• Be sure to select the correct piston configuration and bore size to match your application.
• Oversized pistons require the block to be bored and honed to the matching size.

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