King Engine Bearings MB637XPSTDX Race Main Bearing Set for BMW S85B50A V10 Engine

The King Engine Bearings MB637XPSTDX is a high-performance main bearing set engineered specifically for the BMW S85B50A 5.0L V10 engine found in E60 M5 and E63/E64 M6 models. These race-grade bearings feature King's advanced pMax Black coating technology for maximum durability under extreme operating conditions.

Key Features:

• Tri-metal construction combining steel backing, copper-lead intermediate layer, and premium bearing surface for superior strength and fatigue resistance
• pMax Black proprietary polymer coating provides enhanced wear resistance and improved oil retention during high-RPM operation
• Standard (STD) size for factory crankshaft dimensions
• Race-engineered design optimized for high-performance and motorsport applications
• Precision-manufactured to exact OEM specifications with tighter tolerances for competition use
• Complete main bearing set for all journal positions

King Engine Bearings are a trusted choice among professional engine builders and racing teams worldwide. The pMax Black coating reduces friction while protecting against scuffing during cold starts and high-load conditions. These bearings are ideal for street performance builds, track use, and full racing applications where reliability and durability are critical.