What does 'STD' size mean for these main bearings?

STD stands for Standard size. This means the bearings are manufactured to the original equipment manufacturer's (OEM) specifications and are intended for use when your engine's crankshaft journals are still within their original factory diameter and have not been machined undersize.

What is the advantage of the lead-free composite material?

The lead-free composite material is an environmentally safer alternative to traditional bearing materials. It's designed to handle low to medium load conditions effectively, providing reliable performance for many street-driven engines while meeting environmental regulations.

Do these bearings come with installation hardware?

This listing is for the main bearing set only. Installation hardware, such as main bearing bolts or seals, are typically sold separately. Always refer to the manufacturer's installation instructions for a complete list of required components.

Specifications

Brand: King Engine Bearings
Part #: MB5259AM
UPC: 611500388002

King Engine Bearings Acura B18A1/B1/C1/C5 K20A/K24A Main Bearing Set - Size STD

Name: King Engine Bearings Acura B18A1/B1/C1/C5 K20A/K24A Main Bearing Set - Size STD
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-acura-b18a1-b1-c1-c5-k20a-k24a-main-be-t14-4313506
Price: 38.77 USD
Availability: InStock

$38.77

In Stock

King Engine Bearings main bearing set for Acura and Honda engines. STD size, lead-free composite. Verified fitment.

Key Features

Fits a wide range of Acura and Honda engines, including Integra, TSX, Accord, CR-V, and Civic models.
Standard (STD) size bearings for use on factory-spec crankshafts.
Constructed with a lead-free, environmentally safe composite material.
Features a bi-metal aluminum base for good performance.
Ideal for low to medium-load engines commonly found in street vehicles.
Specialized bearing manufacturer with a focus on engine components since 1960.

⚠️ 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

When you're rebuilding the bottom end of your engine, getting the main bearings right is crucial for smooth operation and long life. This main bearing set from King Engine Bearings is designed for a range of popular Acura and Honda engines, including those found in the Acura Integra, TSX, and Honda Accord. These bearings are a key component in supporting your engine's crankshaft, ensuring it spins true and with minimal friction.

King Engine Bearings specializes in this exact area, focusing on creating well-built bearings that stand up to the demands of everyday driving. This particular set uses a lead-free, environmentally safe composite material over a bi-metal aluminum base. This construction is ideal for low to medium-load engines, offering reliable performance and durability for many street-driven applications. They are a standard size (STD), meaning they're intended for crankshafts that are still within their original factory specifications.

If your crankshaft journals are in good shape and haven't been machined undersize, these standard-size bearings are what you'll need. Make sure to check your crankshaft's condition and specifications before ordering to ensure you get the correct size for your rebuild.