King Engine Bearings MB4104XP05 XP Series Main Bearing Set Nissan - for VG30DE VG30DETT

The King Engine Bearings MB4104XP05 is a high-performance main bearing set engineered specifically for Nissan VG30DE and VG30DETT engines. Part of King Racing's XP Series, these bearings feature advanced metallurgical technology designed to withstand extreme loads in high-performance and racing applications using forged steel aftermarket crankshafts.

XP Series Technology:

The XP Series bearings utilize pMax Black tri-metal construction, which is 24% harder than conventional tri-metal race bearings. This enhanced copper-lead tri-metal structure includes a nickel barrier layer and SecureBond adhesion system for superior stability between layers. The metallurgically enhanced performance overlay is hardened to 0.0005" thickness, providing exceptional resistance to surface fatigue and wear under sustained high loads.

Key Performance Features:

• Superior Load Capacity: 15-30% greater load capacity compared to traditional bearings for high-stress racing applications
• Bulls Eye Tolerance: Industry-leading wall tolerances with all shells matched to 0.0001" for precise fitment
• Half-Grooved Main Design: Upper shells are half-grooved to maintain maximum load capacity on lower shells while ensuring proper oil distribution
• Enlarged Chamfered Oil Holes: Improved oil flow and distribution for better lubrication under high RPM conditions
• Medium Eccentricity: Optimizes load distribution across the bearing surface while improving oil film characteristics
• Increased Bearing Height: Enhanced bearing-to-bore contact improves heat transfer and reduces spin potential at high RPM
• Narrowed Profile: Designed to accommodate large-radius crankshafts commonly found in performance builds

Ideal Applications:

These bearings are engineered for demanding racing environments including circle track, off-road, marine offshore racing, and other high-load, long-duration applications where forged steel crankshafts are required. The XP Series construction makes them suitable for extended periods of extreme performance use.

What's Included:

Complete main bearing set for Nissan VG30DE and VG30DETT engines with 0.5mm oversize clearance.