S63B44 Piston Set for BMW M5, M6, X5, X6 (E70, F10, F12) 4.4T (Compatible with: BMW)
Aftermarket and High-Performance Piston Kits for the BMW S63B44 4.4-Liter V8 Twin-Turbocharged Engine
Description
Quantity: 8 pistons (one set)
Standard bore: 89.00 mm (oversize options, such as 89.20 mm or 89.25 mm, are available depending on the brand)
Stroke: 88.3 mm
Compression ratio: Typically ranges between 9.3:1 (for factory-style forced-induction configurations), 9.5:1, and 10.0:1; can go as high as 10.5:1 or 11:1 (depending on specific application requirements).
Thickness of the first compression ring: 1.0 mm
Thickness of the second compression ring: 1.2 mm
Thickness of the oil control ring: 2.8 mm
Piston pin dimensions: typically 22.0 mm / 0.866 inches in diameter
