King Engine Bearings Main Bearing Set
2013–2020 Subaru BRZ / 2017–2020 Toyota 86 FA20/FB20 Engine
MB5745SI.026
Overview:
The King Engine Bearings Main Bearing Set is engineered specifically for the Subaru FA20 and FB20 engines found in the 2013 to 2020 Subaru BRZ and the 2017 to 2020 Toyota 86 models. Designed with precision and durability in mind, this set features a .025 oversized size to accommodate engine rebuilds or performance upgrades requiring increased bearing clearance. King’s main bearings are trusted by professional engine builders and enthusiasts alike for their reliability and ability to withstand high-stress conditions.
This main bearing set is ideal for those performing engine rebuilds, repairs, or modifications where maintaining optimal bearing performance and longevity is critical. It ensures smooth crankshaft rotation, reduces friction, and helps protect your engine’s internal components under demanding driving conditions.
Key Features:
King Engine Bearings are renowned for their advanced materials and manufacturing quality. This main bearing set offers the following key features:
- Bimetal construction with an aluminum-silicon base for excellent wear resistance and conformability
- .025 inch oversized sizing to accommodate engine rebuilds with increased journal diameters
- Precision manufacturing tolerances for consistent fit and reliable performance
- Optimized surface finish to reduce friction and improve oil film retention
- Compatibility with Subaru FA20 and FB20 engines, ensuring proper fitment and function
- Durable design capable of handling high RPM and increased loads
- Trusted brand with a strong reputation in motorsports and performance applications
Construction & Design:
King’s main bearings utilize a bimetal design featuring an aluminum-silicon alloy base layer. This material combination offers a balance of strength, fatigue resistance, and excellent conformability to the crankshaft journals. The aluminum-silicon base provides a durable foundation, while the bearing surface is engineered to maintain a stable oil film, reducing metal-to-metal contact and wear.
The bearings are manufactured to exacting tolerances, ensuring consistent thickness and roundness to maintain proper clearances within the engine. This precision helps prevent premature wear and contributes to the overall longevity of the engine rebuild or upgrade. The .025 oversized sizing is specifically designed for engines that have been machined or require larger bearing clearances due to wear or performance modifications.
Installation & Fitment:
This main bearing set is a direct fit replacement for the Subaru FA20 and FB20 engines used in the Subaru BRZ (2013–2020) and Toyota 86 (2017–2020). Installation should be performed by a qualified engine builder or technician with experience in precision engine assembly. Proper measurement of journal diameters and bearing clearances is essential to ensure correct fitment and optimal engine performance.
Because these bearings are .025 oversized, they are intended for use with crankshafts that have been machined to this size. It is important to verify compatibility with your engine’s specifications before installation to avoid improper clearances or potential engine damage.
What’s Included
- Main bearing set sized at .025 oversize for Subaru FA20/FB20 engines
- Complete set of main bearings required for engine assembly
- Packaging and documentation from King Engine Bearings
Ideal For:
This main bearing set is ideal for automotive enthusiasts, professional engine builders, and mechanics performing engine rebuilds or upgrades on Subaru BRZ and Toyota 86 models equipped with FA20 or FB20 engines. It is especially suited for those who require oversized bearings due to crankshaft machining or who seek enhanced durability and reliability in high-performance or high-mileage applications.
