8-Piece Piston Assembly Set – Φ92.9/24mm – M278 – Compatible with Mercedes-Benz W166, W221, W222 (4.6L/4.7L) – A2780302317

The Mercedes-Benz M278 4.7L Twin-Turbo V8 Standard (STD) Piston Assembly (OE Part No.: 2780302317) features a bore diameter of 92.9mm, a piston pin diameter of 24mm, and a compression height of 53mm. Crafted from ZL109 aluminum alloy, this piston is specifically designed for a compression ratio of 10.5:1 and is equipped with a piston ring set sized at 1.2mm/1.5mm/2.0mm, making it suitable for engines with a displacement of 4663cc.