What does STDX size mean for these bearings?

STDX size indicates that these main bearings are 0.0005 inches larger in diameter than a standard size bearing. This sizing is typically used when the crankshaft journals have been machined undersize during an engine rebuild to help achieve the correct oil clearance.

What is the XP overlay material?

The XP overlay is a specialized material developed by King Engine Bearings. It's a high-performance overlay with a lower tin content, known for its good embeddability and compatibility with different crankshaft materials.

Are these bearings suitable for performance applications?

Yes, King Engine Bearings are designed to handle the demands of performance engines. The XP overlay material and overall construction make them a solid choice for rebuilding your Holden V8.

Specifications

Brand: King Engine Bearings
Part #: MB5381XPSTDX
UPC: 611500537042

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

Name: King Engine Bearings Holden 253/308CI 5.0L/5.7L (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-holden-253-308ci-5-0l-5-7l-size-stdx-m-t14-532210
Price: 112.88 USD
Availability: BackOrder

$112.88

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King Engine Bearings Main Bearing Set MB5381XPSTDX. STDX size for Holden 253/308CI 5.0L/5.7L engines.

Key Features

This is the STDX size main bearing set, which is 0.0005 inches larger in diameter than standard.
Features King's XP overlay material, a high-performance overlay with lower tin content.
Designed for Holden 253, 308, 5.0L, and 5.7L engines.
This set includes the main bearings needed for your engine rebuild.

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About this part

Product Details

In this set, you get the main bearings for your Holden 253, 308, 5.0L, or 5.7L engine. These are the STDX size bearings, which means they are 0.0005 inches larger in diameter than standard size bearings. This sizing is often used to help restore proper oil clearance when the crankshaft journals have been machined undersize during a rebuild.

King Engine Bearings uses a specialized overlay material called XP, which is a high-performance overlay with a lower tin content. This material is known for its excellent embeddability and compatibility with various crankshaft materials. The bearings are designed to handle the demands of performance engines, offering a solid option for rebuilding your Holden V8.