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 |  SKU: MB5745SI

King Engine Bearings SI Series Main Bearing Set - Size STD

Subaru FA/FB
$249.95
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Description

The King Engine Bearings SI Series Main Bearing Set (Size STD) is an OE-quality replacement option for Subaru FA/FB engines. Built with application-specific engineering, this set provides a dependable balance of durability, performance and value for everyday and medium-load use.

Using King’s TechLab-developed aluminium alloy with silicone, these bearings deliver accurate fitment and stable clearances in standard-size crankshaft applications. Ideal for workshop engine servicing or reliable stock replacements, the SI Series helps ensure consistent oil film support and long-term wear resistance.

Features and Benefits

  • OE replacement for Subaru FA/FB – Designed as a direct-fit main bearing solution in standard size for FA/FB engines.
  • Application-specific engineering – Bearing material and geometry tailored to the Subaru FA/FB platform for consistent performance.
  • TechLab optimised alloy – Aluminium alloy strengthened with silicone, purpose-built for engines operating under medium-load conditions.
  • Upgraded bi-metal construction – Unique aluminium alloy with tin and 3% silicone offers a robust alternative to conventional bi-metal and some tri-metal options.
  • Compatible with nodular cast iron crankshafts – ~40 HV hardness provides the right balance of strength and wear resistance.
  • Cost-effective reliability – Smart material selection delivers dependable service life without sacrificing fit or performance.

Technical Specifications

  • Part number (SKU): MB5745SI
  • Series: King SI Series
  • Engine fitment: Subaru FA/FB (main bearings)
  • Size: Standard (STD)
  • Construction: Bi-metal
  • Material: Aluminium alloy with tin and 3% silicone
  • Typical application: OE replacement, medium-load engines
  • Approximate hardness: ~40 HV (suitable for nodular cast iron crankshafts)

Fitment Table