Precision-Engineered Crankshaft Bearings for BMW N63/N63B44 4.4L V8 Engines

High-Grade Material Construction

Manufactured with premium alloy steel backing and advanced aluminum-tin overlay for superior fatigue resistance and load capacity. Multi-layer precision coating ensures optimal oil retention and reduced friction under extreme temperatures.

Exact OEM Replacement Specs

Direct-fit replacement for crankshaft main/connecting rod bearings (STD/+0.25/+0.5mm sizes included). Laser-etched size markings prevent installation errors. Matches BMW OE part numbers 11217576757/11217576760/11247617338/11247617339.

Performance-Optimized Design

Engineered for turbocharged N63/N63B44 engines with reinforced edges to withstand high combustion pressures. Micro-groove surface finish enhances hydrodynamic lubrication during cold starts and high-RPM operation.

Bulk Purchase Advantage

Global wholesale pricing with volume discounts for repair shops/tuner studios. Ships in OEM-grade packaging with anti-corrosion coating. Compatible with 2008-2018 BMW X5/X6 50i, 550i/750i models.

Industrial-Grade Durability

ISO 9001-certified production with ultrasonic cleaning and 100% dimensional inspection. Outperforms aftermarket alternatives in extended drain interval testing (300+ hours at 150°C).