King Engine Bearings MB4272MC MC Series Polymer Coated OE Replacement Main Bearing Set

The King Engine Bearings MB4272MC is an OE-replacement crankshaft main bearing set designed for the Holden Alloytec 175 and 190 engines. Part of King's advanced MC Series, this set delivers superior protection and longevity for modern engines operating under demanding conditions.

MC Series K-340 Nano-Composite Polymer Coating:

The MB4272MC features King's proprietary K-340 nano-composite polymer coating applied over a high-strength bi-metal substrate. This coating is engineered to provide excellent anti-friction and wear resistance properties without adding any thickness to the bearing's precision wall dimensions.

Key Features:

• Bi-Metal Construction: Steel back bonded to a strengthened aluminum alloy base for superior structural integrity
• K-340 Polymer Coating: Nano-composite polymer topcoat with solid lubricant and ceramic additives for reduced friction and extended wear life
• Lead-Free Formula: Environmentally compliant, lead-free bearing material
• Start-Stop Compatible: Specifically suited for start-stop and hybrid engine applications that experience continuous metal-to-metal contact conditions
• Factory Applied Coating: Polymer coating applied at the King factory with no added thickness to maintain precision tolerances
• OE Replacement Grade: Direct replacement for factory main bearings — includes 4 pairs (full main bearing set)
• Available in Multiple Sizes: Standard and oversized options available to accommodate worn or machined crankshaft journals

King Engine Bearings has been manufacturing precision engine bearings since 1960, and the MC Series represents their latest advancement for high-demand modern engines. The MB4272MC is the ideal choice for builders seeking a reliable, performance-grade OE replacement main bearing set for the Holden Alloytec 175 and 190 engine families.