King Engine Bearings MB5359AM0.25 Main Bearing Set Mazda FE Undersize - 2.0L 0.25mm

This set is offered in a 0.25mm undersize, making it ideal for engine rebuilds where the crankshaft journals have been reground to that dimension.

Built on King's AM-Series (ALECULAR Material) platform, these bi-metal bearings feature a standard aluminum-based alloy on a high-strength steel backing — equivalent to SAE-783 — engineered for reliable performance in low to medium load passenger car engines. The material offers excellent macro-particle embedability and high conformability, helping to protect crankshaft journals from debris and minor surface irregularities.

Key Features:

• Bi-Metal Construction: Aluminum-based alloy (SAE-783 equivalent) bonded to a high-strength steel backing for durability and conformability
• 100% Lead-Free: Environmentally safe formulation meeting modern standards
• Bull's Eye Tolerance™ Technology: Proprietary production process combining precision machining, overplating, and computerized wall thickness monitoring to deliver the tightest shell-to-shell thickness consistency in the industry
• 0.25mm Undersize: Designed for reground crankshafts at the 0.25mm undersize specification
• Complete Set: Includes 5 pairs of main bearing shells for a full engine rebuild
• OE Replacement Grade: Engineered to meet or exceed original equipment specifications for street and marine applications

King Engine Bearings has specialized exclusively in engine bearings since 1960, bringing decades of engineering expertise to every bearing set they produce. The AM-Series is the ideal choice for OE-quality engine rebuilds requiring proven, dependable crankshaft bearing performance.