King Engine Bearings MB5770SI0.5 Main Bearing Set 0.5mm Undersize for Nissan VK45/VK50/VK56

The King Engine Bearings MB5770SI0.5 is a precision-engineered main bearing set designed specifically for Nissan VK45DD/E, VK50VE, and VK56DE/VD engines. This 0.5mm undersize bearing set delivers reliable performance for OE replacement and aftermarket engine rebuilding applications.

These bearings feature King's advanced SI-Series bi-metal design, utilizing an aluminum-based alloy strengthened with 2.5-3% silicon. This lead-free construction provides exceptional durability for medium-load engines and is particularly effective with nodular cast iron crankshafts. The silicon particles help condition journal surfaces during operation, reducing friction and improving wear resistance.

Key Features:

• Bi-metal construction with aluminum silicon alloy for enhanced strength
• 0.5mm (0.020") crankshaft undersize for precision machined cranks
• 100% lead-free design for environmental safety
• Improved oil clearance tolerances reduce wear and extend engine life
• Superior crankshaft finish compatibility reduces microscopic ferrite peaks
• Excellent fatigue strength and seizure resistance

King SI-Series bearings are engineered to maintain OEM clearances throughout the engine's service life, reducing operating noise, vibration, and excess oil flow. The unplated bi-metal design offers up to 40% better wall thickness control compared to tri-metal bearings, ensuring consistent performance. These bearings are ideal for gasoline engine rebuilds using factory crankshafts and offer outstanding durability for street, marine, and performance applications.

King Engine Bearings has specialized in precision engine bearings since 1960, manufacturing all products under one roof to ensure the highest quality standards and dimensional accuracy.