King Engine Bearings MB5209XP XP pMax Black Tri-Metal Main Bearing Set Mitsubishi 4G63 4G64 EVO I-IV STD

The King Engine Bearings MB5209XP is a professional-grade, race-proven crankshaft main bearing set engineered for Mitsubishi 4G63 and 4G64 engines found in EVO I–IV and second-generation DSM platforms. Built on King's XP Series platform and featuring the advanced pMax Black™ tri-metal construction, these bearings are designed to handle the extreme loads and sustained high-RPM demands of both competition and high-performance street applications.

pMax Black™ Tri-Metal Technology:

• 24% greater load capacity than conventional tri-metal race bearings, with an overlay load capacity exceeding 10,200 psi
• Proprietary nano-scaled hardening process that modifies the overlay molecular structure to create a fatigue-resistant black shield
• Increased tin content in the intermediate layer (4.5%) results in a 22% harder intermediate layer at 115 HV for superior structural support
• SecureBond™ micro-etch adhesion process strengthens the bond between tri-metal layers, reducing risk of delamination under extreme load or metal-to-metal contact
• 15%–30% greater overall load capacity compared to traditional performance bearings

XP Series Geometric Features:

• Bull's Eye Tolerance™ — industry-leading wall thickness consistency with all shells matched to 0.0001", minimizing fitting time and reducing required bearing inventory
• Enlarged, chamfered oil holes on mains for improved oil flow and film distribution
• Medium eccentricity geometry for optimum load distribution and lubrication
• Half-groove design on upper main shell for uncompromised lower shell load capacity
• Compatible with forged steel aftermarket crankshafts

Specifications:

• Part Number: MB5209XP
• Size: Standard (STD)
• Material: XP Tri-Metal — copper-lead construction with nickel barrier
• Groove Style: 3/4 groove (upper shell grooved)
• Engine Compatibility: Mitsubishi 2.0L 4G63 (DOHC 16V, SOHC 16V), 4G63T, and 2.4L 4G64-S4M, 1992 and newer, 7-bolt configuration

Ideal for sustained high-load racing disciplines including circuit, drag, and time attack applications, the MB5209XP delivers the precision and durability demanded by serious performance engine builders working with Mitsubishi's legendary 4G63/4G64 platform.