What does the STDX size mean for these bearings?

The STDX designation means these main bearings are 0.001 inch undersize compared to standard main bearings. This size is often used when the crankshaft journals have been machined to a specific undersize during an engine rebuild.

What is the benefit of the coating on these bearings?

The specialized overlay coating on these King bearings is designed to improve their resistance to wear and damage. This is particularly beneficial in performance applications where bearing clearances might be tighter or oil pressure is carefully managed.

Are these bearings suitable for a stock engine rebuild?

While these are performance bearings, they are well-suited for any B58B30A engine rebuild where reliable crankshaft support is a priority. The coating offers an added layer of protection that can be beneficial even in non-extreme applications.

King Engine Bearings Main Bearing Set STDX MB7779XPC

Name: King Engine Bearings BMW B58B30A Coated Performance Main Bearing Set - Size STDX
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-b58b30a-coated-performance-main-be-t14-438911
Price: 191.53 USD
Availability: InStock

King Engine Bearings BMW B58B30A Coated Performance Main Bearing Set - Size STDX

$191.53

Only 7 left in stock

King Engine Bearings BMW B58B30A Coated Performance Main Bearing Set - Size STDX

Key Features

Fits BMW B58B30A engines.
Coated performance main bearing set.
STDX size is 0.001 inch undersize.
Specialized overlay helps resist wear and damage.
Designed for performance engine builds.

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Product Details

If you're rebuilding the bottom end of your BMW B58B30A engine, a solid set of main bearings is crucial for keeping everything running smoothly. These coated performance main bearings from King Engine Bearings are built to handle the demands of a performance-oriented build, ensuring your crankshaft stays properly supported under load.

King uses a specialized overlay on these bearings, which is designed to work well with their high-performance bearing materials. This coating helps to improve the bearing's ability to resist wear and damage, especially in applications where clearances might be tighter or oil pressure is a key concern. The STDX size indicates these bearings are 0.001 inch undersize, which is a common size for engine rebuilds where crankshaft journals may have been ground to match.

When you're putting an engine back together, especially one with performance in mind, using well-made components like these King bearings makes a difference. They are a popular choice for builders looking for reliable support for their crankshaft.