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King Engine Bearings MB5745SI.026 Main Bearing Set Subaru - FA20 FB20

(Subaru Impreza 2012-22, Outback 2013-19, Forester 2011-18, WRX 2015-21, Legacy 2013-19, Crosstrek 2016-22, BRZ 2013-20, XV Crosstrek 2013-15 + 3 more models)

Part of: King Engine Bearings Main Bearing Set Oversize

Other options in this family: King Engine Bearings MB5835SI0.5 King Engine Bearings MB5557SI0.75 King Engine Bearings MB4102SI0.25 King Engine Bearings MB5280SI0.5 King Engine Bearings MB5770SI0.25

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB5745SI.026
7 reviews
Sale Price

$125.66

Estimated ship date Monday, November 30

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Product Details

The King Engine Bearings MB5745SI.026 is a complete main bearing set engineered for Subaru FA20 and FB20 series engines. King Engine Bearings is a globally recognized OEM and performance bearing manufacturer, producing precision engine bearings held to exacting tolerances for reliable performance in both street and motorsport applications.

This set is sized at +0.026mm oversize, making it suitable for engines where the crankshaft main journals have been reground or are worn beyond standard clearance specifications. Using the correct oversize bearing ensures proper oil film clearance for optimal lubrication and crankshaft longevity.

Key Features:

  • Designed specifically for Subaru FA20 (BRZ/86/FR-S) and FB20 horizontally-opposed (Boxer) engines
  • +0.026mm oversize for use with reground or undersized crankshaft journals
  • Manufactured with King's SI (Silicon) tri-metal bearing material for enhanced wear resistance and conformability
  • Precision-machined to tight tolerances for consistent oil clearance and proper hydrodynamic lubrication
  • High-strength steel backing for stability under load
  • Engineered to meet or exceed OEM specifications
  • Suitable for performance, high-revving, and forced-induction FA20/FB20 applications

King Engine Bearings' SI series incorporates a silicon-aluminum alloy overlay that provides excellent compatibility with modern engine oils and improved fatigue strength compared to standard bimetal designs. This main bearing set is a trusted choice for engine builders performing precision rebuilds on Subaru FA20 and FB20 platforms.

Products specifications

Fits

Subaru Impreza 2012-22, Outback 2013-19, Forester 2011-18, WRX 2015-21, Legacy 2013-19, Crosstrek 2016-22, BRZ 2013-20, XV Crosstrek 2013-15, XV 2013-16, 2018-21; Scion FR-S 2013-16; Toyota 86 2017-20

Material

bimetal (aluminum silicon base)

Undersize

.026

Flange Oversize

FL STD

Order process was simple and easy. Only thing I would have preferred was for you to include an estimated shipping date during the order process. After order shipped, an arrival date was provided with tracking information. However, package still arrived 2 days later than expected.

Was very easy to navigate around there site.....definetly would use again

Good thank u

Easy! and logging in via Amazon made me not worry about never having ordered something form you before-

I would like expected shipping date

Purchased a stillen brake kit. Received a stillen strut tower bar. Despite invoice having the correct stock # from stillen.

ok

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