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

The +0.25mm sizing indicates that these bearings are intended for use on crankshaft journals that have been machined down by 0.25mm. This is a common step during engine rebuilding to correct wear or damage on the crankshaft and ensure proper bearing clearance.

What is the material of these main bearings?

These main bearings are made from a bi-metal aluminum material and feature a lead-free, environmentally safe composite layer. This combination is chosen for its suitability in medium-load engine applications.

Are these bearings suitable for high-performance or racing engines?

These bearings are designed for medium-load engines. For high-performance or racing applications, it's recommended to consult the manufacturer's specific product lines designed for those demanding conditions.

Specifications

Brand: King Engine Bearings
Part #: MB4272SI0.25
UPC: 611500527180

King Engine Bearings Holden Alloytec 175/190 (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Holden Alloytec 175/190 (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-holden-alloytec-175-190-size-0-25mm-ma-t14-770380
Price: 50.71 USD
Availability: BackOrder

$50.71

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King Engine Bearings Holden Alloytec Main Bearing Set MB4272SI0.25. Features lead-free composite for medium-load engines.

Key Features

Fits many Buick, Cadillac, Chevrolet, GMC, Pontiac, Saab, Saturn, and Suzuki models.
Main bearing set is sized +0.25mm for use with machined crankshaft journals.
Constructed with a lead-free, environmentally safe composite material.
Features a bi-metal aluminum construction.
Designed for medium-load engines.

⚠️ 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

Built with a lead-free, environmentally safe composite material, these main bearings are a solid option for medium-load engines. King Engine Bearings specializes in creating high-quality engine bearings, and this set is made from a bi-metal aluminum material that offers good performance for its application.

This particular set is sized at +0.25mm, meaning it's designed to fit crankshaft journals that have been machined down by that amount during an engine rebuild. This is a common practice when dealing with worn or damaged crankshafts to restore proper bearing clearance. These bearings are suitable for a wide range of vehicles, including models like the Buick Enclave, Cadillac CTS, and Chevrolet Camaro, among many others.