King Engine Bearings MB4058XPSTDX XP Series Main Bearing Set Nissan - VQ35DE 24V

The King Engine Bearings XP Series Main Bearing Set is engineered for high-performance and racing applications using the Nissan VQ35DE 24-valve engine with forged steel aftermarket crankshafts. This standard size main bearing set delivers exceptional durability under extreme loads and extended high-RPM operation.

pMax Black Tri-Metal Technology:

The XP series features King Racing's proprietary pMax Black tri-metal construction, which is 24% harder than conventional tri-metal race bearings. This enhanced copper-lead structure includes a nickel barrier and SecureBond adhesion process for superior stability between layers. The 0.0005-inch metallurgically hardened performance overlay provides outstanding resistance to surface fatigue and wear under extreme racing conditions.

Performance Features:

• 15-30% Greater Load Capacity: Designed to handle significantly higher loads than traditional bearings
• Bulls Eye Tolerance: Industry-leading wall thickness tolerances with all shells matched to 0.0001 inch
• Half-Grooved Design: Mains feature 1/2 groove configuration for maximum lower shell load capacity
• Increased Bearing Height: Improves bearing-to-bore contact and heat transfer while reducing spin potential
• Enhanced Oiling: Enlarged, chamfered oil holes optimize lubrication flow
• Medium Eccentricity: Enables optimal load distribution across the bearing surface
• Narrowed Design: Compatible with large-radius crankshafts

Ideal Applications:

Perfect for high-load, long-duration racing including circle track, off-road, marine offshore racing, and other demanding motorsports applications that utilize forged steel crankshafts. These bearings are specifically designed for engines that generate sustained extreme loads and high RPM conditions.

King Racing bearings are the choice of professional engine builders who demand precision, durability, and performance. This main bearing set provides the advanced metallurgical properties and geometric features required for competitive racing environments.