What does the +0.25mm sizing mean for these bearings?

The +0.25mm sizing indicates that these bearings are intended for use when the crankshaft journals have been machined down by 0.25mm. This is a common practice when rebuilding an engine to ensure a proper fit with worn or resurfaced crankshaft journals.

What is the purpose of the TriArmor coating?

The TriArmor coating is a multi-layer system designed to enhance bearing durability and reduce friction. It aims to protect the bearing surface from wear and ensure consistent oil flow and retention under various engine operating conditions.

Are these bearings suitable for high-performance or turbocharged Subaru engines?

Yes, these bearings are designed for Subaru EJ20, EJ22, and EJ25 engines, which commonly include turbocharged and performance applications. The TriArmor coating is intended to provide added protection for these demanding uses.

King Engine Bearings Main Bearing Set MB5382SI0.25

Name: King Engine Bearings Subaru EJ20/EJ22/EJ25 (Incl. Turbo) Main Bearing Set - Size +0.25mm
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-ej20-ej22-ej25-incl-turbo-main--t14-432457
Price: 40.47 USD
Availability: InStock

King Engine Bearings Subaru EJ20/EJ22/EJ25 (Incl. Turbo) Main Bearing Set - Size +0.25mm

$40.47

Only 6 left in stock

King Engine Bearings Subaru EJ20/EJ22/EJ25 (Incl. Turbo) Main Bearing Set - Size +0.25mm

Key Features

Main bearing set for Subaru EJ20, EJ22, and EJ25 engines, including turbocharged variants.
This set is +0.25mm oversize, intended for use with a crankshaft machined to that size.
Features King's TriArmor coating, a three-layer system for wear protection and friction reduction.
The TriArmor coating includes a tin-based overlay, a polymer layer, and a tin-aluminum alloy outer layer.

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Product Details

King Engine Bearings is known for making solid engine bearings, and this main bearing set is a good example of their work for Subaru EJ20, EJ22, and EJ25 engines, including turbocharged models. When you're rebuilding an engine, especially one with a performance history like the Subaru EJ series, getting the main bearings right is crucial for proper crankshaft support and oil flow. This set is sized at +0.25mm, meaning it's intended for use when the crankshaft journals have been machined to this specific undersize.

These bearings feature King's unique 'TriArmor' coating, which is a multi-layer system designed to help protect against wear and friction. The inner layer is a tin-based overlay, the middle layer is a specialized polymer, and the outer layer is a tin-aluminum alloy. This combination aims to provide a durable surface that can handle the stresses of engine operation while maintaining good oil retention. The goal is to ensure your engine runs smoothly and reliably after the rebuild.