What material are these main bearings made from?

These main bearings are constructed from a bi-metal aluminum material and feature a lead-free, environmentally safe composite layer. This combination is designed for durability and performance in low to medium-load engines.

Are these bearings a standard size?

Yes, this set is a standard size (STD) main bearing set. It is designed to replace the original equipment bearings without requiring any machining if the crankshaft journals are within factory specifications.

What kind of engines are these bearings best suited for?

King Engine Bearings MB5304AM are ideal for engines that operate under low to medium load conditions. They are a popular choice for many DOHC and SOHC 8 and 16-valve applications found in the compatible vehicle list.

Specifications

Brand: King Engine Bearings
Part #: MB5304AM
UPC: 611500389573

King Engine Bearings Kia/Mazda DOHC 16 Valve/SOHC 16 Valve/SOHC 8 Valve (Size STD) Main Bearing Set

Name: King Engine Bearings Kia/Mazda DOHC 16 Valve/SOHC 16 Valve/SOHC 8 Valve (Size STD) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-kia-mazda-dohc-16-valve-sohc-16-valve--t14-280157
Price: 29.45 USD
Availability: BackOrder

$29.45

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King Engine Bearings STD Main Bearing Set. Features lead-free composite and bi-metal aluminum material for improved engine performance.

Key Features

Fits 1991-1996 Ford Escort, 2001-2005 Kia Rio, 1986-1994 Mazda 323, 1994-2005 Mazda Miata, 1990-2000 Mazda Protege, 1991-1994 Mercury Capri, and 1991-1996 Mercury Tracer.
Features a lead-free, environmentally safe composite material.
Constructed with a bi-metal aluminum material.
Ideal for low to medium-load engines.
Standard (STD) size main bearing set.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

In this box, you get a standard size main bearing set from King Engine Bearings, part number MB5304AM. These bearings are built with a lead-free, environmentally safe composite and a bi-metal aluminum material, making them a solid option for many low to medium-load engines. They are designed to fit a range of vehicles, including popular models like the Mazda Miata, Kia Rio, and Ford Escort.

King Engine Bearings has been specializing in engine bearings since 1960, focusing on supplying well-built components. This particular set uses a bi-metal aluminum construction, which helps manage heat and wear in the engine's rotating assembly. The lead-free composite is an updated material choice that meets environmental standards while still providing reliable performance for the intended applications.