
Stem N20b20 Crankshaft Gasoline Engine OEM 11217599247 for BMW. OEM/ODM Customization: Supports full customization from samples, designs, and flexible minor adjustments. 25 Years Experience: Over 20 years of engineering and production experience in crankshaft manufacturing. 100% Quality Inspection: Strict visual and functional inspection for all finished products before shipment. Complete Production Line: In-house processes from raw material melting, casting, heat treatment to machining and packing. ISO 9001 Certified: Manufacturing facility certified with ISO 9001 quality management standards. Stable Quality Guarantee: Pre-production samples and final inspections ensure consistent product quality. Global Export Experience: Products exported to Brazil, Egypt, Philippines, UAE, Singapore, and more. Professional Casting Tech: Advanced techniques including plasma nitride, ductile iron casting, and resin sand coating.