What size are these main bearings?

These are King Engine Bearings main bearings in STDX sizing. This indicates they are standard size, meaning they are meant for a crankshaft with factory-specified journal dimensions.

What makes these bearings environmentally safe?

These bearings incorporate a lead-free composite material. This design choice helps reduce environmental impact compared to older bearing technologies that contained lead.

Are these bearings suitable for high-performance engines?

These bearings are specifically noted as being ideal for medium-load engines. For high-performance or racing applications, it's always best to consult King Engine Bearings' specific product lines designed for those demands.

Specifications

Brand: King Engine Bearings
Part #: MB5257SISTDX
UPC: 611500435577

King Engine Bearings General Motors 379/V8 Ohv (Size STDX) Main Bearing Set

Name: King Engine Bearings General Motors 379/V8 Ohv (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-general-motors-379-v8-ohv-size-stdx-ma-t14-770605
Price: 74.61 USD
Availability: BackOrder

$74.61

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King Engine Bearings General Motors 379/V8 Ohv (Size STDX) Main Bearing Set. A well-built bearing set for medium-load engines.

Key Features

Fits a wide range of General Motors V8 OHV engines.
Includes main bearings for your engine rebuild.
Made from a bi-metal aluminum material.
Features a lead-free composite for environmental safety.
Designed for medium-load engines.
STDX sizing indicates standard size bearings.

⚠️ 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, the main bearings are critical. This set from King Engine Bearings includes the main bearings you need for a range of General Motors V8 OHV applications, like many Chevrolet C1500 trucks and AM General Hummer models from the late 80s through the early 2000s. These bearings are designed to handle the loads found in medium-duty engines.

King specializes in bearings, and this set is made from a bi-metal aluminum material. They've also incorporated a lead-free composite, making them an environmentally safe choice. The STDX sizing indicates these are 0.000 inch standard size bearings, ready to be installed in your freshly machined or stock crankshaft journals.