King Engine Bearings Main Bearing Set
2013–2020 Subaru BRZ / 2017–2020 Toyota 86 FA20/FB20 Engine
MB5745SI0.75
Overview:
The King Engine Bearings Main Bearing Set (0.75 Oversized) 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 to provide reliable support for the crankshaft, this main bearing set is ideal for enthusiasts and professionals looking to maintain or upgrade their engine’s durability and performance. Whether rebuilding a stock engine or preparing for mild performance enhancements, these bearings offer precise fitment and dependable operation under demanding conditions.
King Engine Bearings is renowned for delivering high-quality, durable engine components that meet or exceed OEM specifications. This oversized bearing set is tailored for applications requiring a 0.75mm undersize, ensuring proper clearance and optimal oil film thickness for enhanced engine longevity.
Key Features:
This main bearing set incorporates advanced materials and manufacturing techniques to ensure superior performance and durability:
- Bimetal construction with an aluminum-silicon base for excellent wear resistance and fatigue strength
- Precision-machined to exact tolerances for a perfect fit in Subaru FA20 and FB20 engine blocks
- 0.75mm oversized design to accommodate crankshaft journal undersizing during rebuilds
- Optimized oil clearance for improved lubrication and reduced friction
- High load capacity to withstand increased stresses from performance driving or engine modifications
- Corrosion-resistant surface treatment to extend bearing life
- Compatible with both naturally aspirated and forced induction setups
- Manufactured under strict quality control standards to ensure consistent reliability
Construction & Design:
King Engine Bearings utilizes a bimetal bearing design featuring an aluminum-silicon alloy base layer that provides excellent conformability and embedability. This construction allows the bearing to adapt to minor imperfections in the crankshaft journal while resisting wear and fatigue over extended use. The aluminum-silicon base also offers superior compatibility with the FA20 and FB20 engine materials, reducing the risk of bearing failure under high loads.
The bearing surfaces are precision ground and finished to maintain tight tolerances and ensure optimal oil film formation. This careful engineering reduces friction and heat generation, contributing to improved engine efficiency and longevity. The 0.75mm oversize dimension is specifically intended for engines requiring crankshaft journal undersizing, making this set an essential component for professional rebuilds and performance upgrades.
Installation & Fitment:
Installation of the King Engine Bearings Main Bearing Set requires standard engine rebuild procedures and should be performed by a qualified technician or experienced enthusiast. The 0.75mm oversize bearings are designed to fit Subaru FA20 and FB20 engines in the specified model years, ensuring direct compatibility without the need for additional modifications. Proper measurement of crankshaft journals and bearing clearances is critical to achieving optimal performance and preventing premature wear.
These bearings are suitable for both OEM rebuilds and performance applications, providing a reliable foundation for engine longevity and smooth operation.
What's Included:
- Main bearing set sized 0.75mm oversize for Subaru FA20/FB20 engines
- Complete set of main bearings for all main journals
- Packaging and documentation from King Engine Bearings
Ideal For:
- Engine rebuilders and mechanics servicing Subaru BRZ (2013–2020) and Toyota 86 (2017–2020)
- Performance enthusiasts upgrading or maintaining FA20/FB20 engines
- Owners seeking reliable, OEM-quality main bearings for naturally aspirated or modified engines
- Motorsport applications requiring durable engine components capable of handling increased loads
