Piston x1 BMW S63 S63B44A X5M X6M E70 E71 4.4L 11257598207

The BMW S63B44 piston is specifically designed for the 4.4-liter twin-turbocharged V8 engine found in M-series models, which operates under high-load conditions.

Category: Uncategorized Tag: Piston assembly

Description

Description

(OEM) Specifications
Bore: 89.00 mm
Stroke: 88.30 mm
Compression ratio: 10.0:1
Piston pin diameter: 22.00 mm
Material: Cast aluminum alloy (ZL109)

Compression height: 32.00 mm
Piston ring configuration: 1.0 mm (top) x 1.2 mm (second) x 2.8 mm (oil)
Piston pin upgrade: Premium H-13 material, 0.225-inch wall thickness
Features: 3D-machined piston crown, lateral gas ports, and molybdenum-based skirt coating