King Engine Bearings MB5403AM0.5 Bi-Metal Main Bearing Set Mitsubishi - 4G63/T 4G64 0.50mm

The King Engine Bearings MB5403AM0.5 is a precision bi-metal main bearing set designed for Mitsubishi 4G63, 4G63T, and 4G64 engines. This set is an +0.50mm oversize application, suited for engine rebuilds where crankshaft journals have been machined undersize.

Built to King's AM-Series standard, these bearings use a standard aluminum-based bi-metal construction equivalent to SAE-783, making them an ideal choice for OE-replacement engine rebuilding on low to medium load applications. The aluminum material is the softest bi-metal in King's range, offering excellent conformability and embeddability to protect crankshaft journals from scratching and wear.

Key Features:

• Bi-Metal Aluminum Construction — Standard aluminum-based material equivalent to SAE-783, optimized for low to medium load engines
• Lead-Free Formula — Environmentally responsible and user-safe bearing material
• King Bull's Eye Tolerance™ Technology — Precision tolerance control for superior fitment and oil clearance
• Superior Embeddability — Helps protect crank journals by absorbing macro-particles and reducing scoring
• +0.50mm Oversize — Engineered for use with crankshafts that have been ground 0.50mm undersize
• OE Replacement Quality — Designed for street engine rebuilds requiring direct-fit reliability

King Engine Bearings has been a trusted name in precision engine bearing manufacturing since 1960, producing bearings to exacting quality standards for automotive, truck, marine, and performance applications.