Engine Piston Kit for Buick, Chevrolet, and Opel 1.6T

Piston Kit for Buick, Chevrolet, and Opel 1.6T Engines (Part Number: 55571126)

Piston assemblies designed for General Motors (GM) 1.6L and 2.0L engines (LLU, LTD, LDK, LDE) typically feature bore specifications of 79mm or 86mm and are constructed from hypereutectic aluminum alloy. Their piston ring grooves are specifically engineered to meet the operational demands of turbocharged or high-compression-ratio applications, and for many of these assemblies, the piston length measures 54mm. The core technical parameters of these engine platforms place particular emphasis on precision engineering tailored for turbocharged operating conditions—a focus exemplified by the 9.3:1 compression ratio utilized in the LDK engine.

Description

Engine Piston Specifications (LLU, LTD, LDK, LDE, LE5, L2B)
1.6L Engines (LLU/LTD/LDE): Typically feature a 79mm bore diameter. A common service replacement piston part number is 55571126, designed specifically for Buick Regal/Excelle and Chevrolet Cruze models.
2.0L Engines (LDK/LDE): These engines generally possess superior structural strength. In the LDK and LNF series, they are frequently paired with a 9.3:1 compression ratio; aftermarket components for these engines are capable of supporting power outputs exceeding 500 wheel horsepower (whp).
1.6L–2.0L Specific Features: In factory turbocharged configurations, these engines typically utilize a flat-top piston design and are constructed from hypereutectic cast aluminum alloy to ensure durability.
LE5 / L2B: Generally classified under the Ecotec engine family. This series employs lightweight aluminum alloy pistons, supplemented by a specialized piston skirt coating designed to effectively minimize frictional resistance.