What does STDX size mean for these bearings?

STDX size indicates that these main bearings are 0.040 inches undersize compared to the standard size. This is the correct size to use if your engine's crankshaft journals have been machined down by 0.040 inches during an engine rebuild.

What is the overlay material on these bearings for?

The high-performance overlay material is a crucial part of the bearing's design. It provides a strong and durable surface that contacts the rotating crankshaft, helping to manage friction and wear during engine operation.

Are these bearings suitable for a stock engine rebuild?

These bearings are specifically sized at STDX (0.040 inches undersize). They are intended for engine rebuilds where the crankshaft has been machined to this undersize. For a stock engine with no crankshaft machining, you would need a standard size bearing.

Specifications

Brand: King Engine Bearings
Part #: MB5566XPCSTDX
UPC: 611500622076

King Engine Bearings Audi/VW ABL/ ADY/ AHH/ AKS (Size STDX) Main Bearing Set

Name: King Engine Bearings Audi/VW ABL/ ADY/ AHH/ AKS (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-audi-vw-abl-ady-ahh-aks-size-stdx-main-t14-432469
Price: 168.86 USD
Availability: BackOrder

$168.86

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King Engine Bearings Audi/VW ABL/ ADY/ AHH/ AKS (Size STDX) Main Bearing Set. For engine rebuilding.

Key Features

This product is a set of main bearings for Audi/VW ABL/ADY/AHH/AKS engines.
The bearings are STDX size, which is 0.040 inches undersize.
Features a high-performance overlay material for durability.
Designed for engine rebuilding applications where crankshaft journals have been machined.

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About this part

Product Details

This kit includes a set of main bearings for your Audi or Volkswagen engine. Specifically, these are STDX size bearings, meaning they are 0.040 inches undersize. This size is often used when the crankshaft journals have been machined down to correct for wear or damage.

King Engine Bearings uses a high-performance overlay material on these bearings. This overlay is designed to handle the stresses of engine operation, providing a durable surface for the crankshaft to spin against. The STDX sizing is crucial for ensuring a proper fit and oil clearance when rebuilding an engine with a turned crankshaft.