King Engine Bearings MB7089XP05 XP Series Tri-Metal Main Bearing Set - 0.5mm

The King Engine Bearings MB7089XP0.5 is an XP Series high-performance crankshaft main bearing set designed for the Volkswagen VR6 2.8L engine, sized at +0.5mm oversize for use with reground crankshafts. Built with King's proprietary pMax Black™ tri-metal copper-lead construction, these bearings feature a metallurgically hardened overlay that delivers up to 24% greater hardness compared to conventional tri-metal race bearings — providing superior fatigue resistance under extreme load and sustained high-RPM conditions.

The XP series was engineered specifically for high-load, long-duration performance applications using forged steel aftermarket crankshafts. The enhanced tri-metal structure, combined with King's advanced geometric design features, makes this set the preferred choice for circle track, off-road, offshore, and other demanding motorsport disciplines.

pMax Black™ XP Series Construction:

• Enhanced Tri-Metal Copper-Lead Construction with nickel barrier and SecureBond™ adhesion for superior bond stability between the top and intermediate layers
• 0.0005" Hardened Performance Overlay — metallurgically enhanced to withstand greater loads and resist surface fatigue
• 15%–30% Greater Load Capacity than traditional bearings, with an intermediate load capacity of 17,000 psi and overlay capacity of 10,200 psi
• Half-Grooved Mains — upper shell is grooved while the lower shell remains ungrooved for maximum lower-shell load capacity

King Bull's Eye Tolerance™ Precision Features:

• Bull's Eye Tolerance™ — all bearing shells are matched to ±0.0001" wall thickness variation, tighter than the industry standard of ±0.00025"
• Increased Bearing Height — improves bearing-to-bore contact and heat transfer, reducing spin potential at high RPM
• Enlarged, Chamfered Oil Holes for improved main bearing oiling
• Medium Eccentricity — optimizes load distribution and oil film maintenance
• Narrowed Design — mains are narrowed to accommodate large-radius crankshafts

Specifications:

• Part Number: MB7089XP0.5
• Type: Main Bearing Set (MB)
• Material: XP Tri-Metal Copper-Lead with pMax Black™ overlay
• Size: +0.5mm oversize (metric undersize for reground crankshafts)
• Application: Volkswagen VR6 2.8L (also fits 2.9L, 3.2L, 3.6L — 12V and 24V variants including AAA, AFP, BDF, BJS engine codes)

King Engine Bearings has supplied precision engine bearings since 1960, earning the trust of professional engine builders across motorsport and aviation. The XP Series is available in a wide range of oversizes, giving builders the flexibility to select the exact clearance needed for their build.