MAHLE 224-3451.020 Engine Piston .020 Overbore Left Bank Duramax LB7/LLY

The MAHLE 224-3451.020 Engine Piston is an OE-quality replacement piston designed for 2001-2005 GM 6.6L Duramax LB7 and LLY diesel engines. This left bank piston features a .020" overbore specification, making it ideal for engine rebuilds where block machining has been performed to restore cylinder bore integrity.

Key Features:

• Left bank position piston for 6.6L Duramax LB7/LLY engines (2001-2005)
• .020" oversized bore dimension for machined cylinder blocks
• 4.055" bore diameter with 3.897" stroke compatibility
• Dish-style piston design with cast aluminum construction
• Compensated ring grooves for proper ring loading and oil control
• Expansion-controlled design reduces engine noise and wear
• Includes wrist pin and retaining clips
• Engineered to meet factory OEM specifications

MAHLE Original pistons are manufactured to stringent OE specifications and feature the same precision engineering found in factory components. The lightweight, expansion-controlled design ensures proper fitting clearances, improved oil control, reduced emissions, and optimal engine performance. Each piston is sold individually but requires a set of 4 pistons to complete the left bank of a V8 Duramax engine.

Note: This piston does not include piston rings. Piston rings must be purchased separately or select the corresponding WR (with rings) version for a complete assembly.