What is the pmax black racing line coating?

The pmax black racing line is a specialized coating developed by King Engine Bearings for racing applications. It is designed to reduce friction and wear, particularly under high-load conditions, to help protect the bearings and improve engine performance.

Why are these bearings .001 inch undersize?

These bearings are .001 inch undersize, meaning they are slightly smaller than standard size. This is intended for use when the crankshaft journals have been machined down by .001 inch to ensure proper oil clearance and a precise fit.

What is the importance of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while maintaining critical oil clearance to lubricate the surfaces and prevent metal-to-metal contact.

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Specifications

Brand: King Engine Bearings
Part #: MB5381XP001
UPC: 611500537011

King Engine Bearings Holden 253/308CI 5.0L/5.7L (Size .001) Main Bearing Set

Name: King Engine Bearings Holden 253/308CI 5.0L/5.7L (Size .001) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-holden-253-308ci-5-0l-5-7l-size-001-ma-t14-532207
Price: 112.88 USD
Availability: BackOrder

$112.88

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King Engine Bearings main bearing set for Holden 253/308CI 5.0L/5.7L engines. Features pmax black racing line for improved performance.

Key Features

Main bearing set for Holden 253, 308CI, 5.0L, and 5.7L engines.
Features King's pmax black racing line coating for reduced friction and wear.
Bearings are .001 inch undersize for use with machined crankshafts.

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About this part

Product Details

If you're rebuilding the bottom end of your Holden 253, 308, 5.0L, or 5.7L engine, a solid set of main bearings is crucial for proper crankshaft support and oil flow. These main bearings from King Engine Bearings are designed to handle the demands of performance applications.

This set features King's pmax black racing line, which is a specialized coating developed for racing applications. This coating helps to reduce friction and wear, especially under high-load conditions, contributing to the longevity of your engine's rotating assembly. The bearings are also .001 inch undersize, which is important to note if you are machining your crankshaft to match.

When installing these bearings, always ensure your crankshaft journals are clean and within the specified tolerances. Proper oil clearance is key to their performance and durability.