King Engine Bearings MB 524AM0.5 Main Bearing Set +0.50mm Oversize for Mitsubishi 4G63

The King Engine Bearings MB 524AM0.5 is a complete crankshaft main bearing set designed as a direct OE replacement for the Mitsubishi 4G63 engine. This set is sized at +0.50mm oversize, intended for use with crankshafts that have been ground 0.50mm undersize during engine reconditioning.

Built on King's proven AM Series bi-metal construction, these bearings use a standard aluminum-based alloy on a high-strength steel backing — the softest bi-metal material in King's lineup. This makes the AM Series an ideal choice for street-driven passenger car engines operating under low to medium load conditions.

Key Features:

• AM Series bi-metal construction — aluminum-based alloy on steel backing for excellent conformability and embedability
• +0.50mm oversize — designed for use with crankshafts machined 0.50mm undersize
• 5 pairs included — complete main bearing set for the 4G63 engine
• 100% lead-free material — environmentally responsible and safe to handle
• Superior macro-particle embedability — helps protect crankshaft journals from scratching and wear
• Tight tolerance control — manufactured to ±0.0001" for precise oil clearance
• Recommended for street and marine applications with low to medium engine loads

King Engine Bearings is a globally recognized manufacturer of precision engine bearings, trusted by OEM suppliers and engine builders worldwide. The MB 524AM0.5 delivers reliable OE-quality performance for 4G63 engine rebuilds requiring a 0.50mm crankshaft grind.