King Engine Bearings MB3324AM0.25 Main Bearing Set Subaru 1800cc 0.25mm Undersize

The King Engine Bearings MB3324AM0.25 is a complete main bearing set designed for Subaru 1800cc engines from 1980 onward. This set is manufactured to a 0.25mm undersize specification, making it an ideal choice for engines that have undergone crankshaft grinding or reconditioning as part of a rebuild or overhaul.

King Engine Bearings is a globally recognized OEM and aftermarket bearing supplier known for precision manufacturing and tight tolerances. Their bearings are engineered to deliver excellent load capacity, superior oil film retention, and long service life under demanding operating conditions.

Key Features:

• Complete main bearing set for Subaru 1800cc engines (1980 and later)
• 0.25mm undersize crankshaft journal clearance for use with reground crankshafts
• AM-series construction featuring aluminum-tin alloy overlay for enhanced wear resistance
• Precision-manufactured to tight OEM tolerances for consistent oil clearance
• High-load capacity design suitable for both street and performance rebuilds
• Tri-metal or bi-metal construction depending on application requirements
• Manufactured to meet or exceed original equipment specifications

King's AM-series bearings feature an advanced aluminum alloy bearing material that provides excellent fatigue resistance and corrosion protection. The 0.25 designation (0.010" undersize equivalent) corresponds to standard engine machine shop regrind increments, ensuring a proper fit with professionally reconditioned crankshafts.

These main bearings are an essential component of any engine rebuild, maintaining proper crankshaft alignment and oil pressure throughout the powerplant. Engineered for reliability, the MB3324AM0.25 set ensures your Subaru 1800cc engine returns to factory-spec performance and longevity after reconditioning.