What does STDX size mean for these bearings?

STDX indicates that these main bearings are 0.001 inch undersize compared to standard size. This is often used when the crankshaft has been machined to a slightly smaller diameter during an engine rebuild to ensure proper oil clearance.

What material are these bearings made from?

These bearings are constructed from a tri-metal material, which is a common and well-regarded choice for engine bearings due to its balance of strength, wear resistance, and conformability.

Do these bearings come with installation instructions?

While these bearings are designed for a direct fit, it is always recommended to refer to the manufacturer's installation instructions or a service manual for the proper procedure and torque specifications when rebuilding your engine.

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Specifications

Brand: King Engine Bearings
Part #: MB7782XPSTDX
UPC: 611500611438

King Engine Bearings Nissan TB48DE Main Bearing Set - Size STDX

Name: King Engine Bearings Nissan TB48DE Main Bearing Set - Size STDX
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-tb48de-main-bearing-set-size-st-t14-432608
Price: 236.92 USD
Availability: BackOrder

$236.92

On Backorder — Expected to ship by Oct 18, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits Nissan TB48DE engines.
STDX size is 0.001 inch undersize for precise crankshaft clearance.
Tri-metal construction offers good strength and wear resistance.
Designed for direct fit installation during engine rebuilding.

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About this part

Product Details

If you're rebuilding the engine in your Nissan TB48DE, a solid set of main bearings is crucial for keeping everything running smoothly. This main bearing set from King Engine Bearings is specifically made for the TB48DE engine, and it's an STDX size, meaning it's 0.001 inch undersize. This is important because it allows for a slightly tighter clearance, which can help improve oil pressure and overall engine performance after a rebuild.

King Engine Bearings are known for their well-built construction. They use a tri-metal material that offers good strength and wear resistance, which is exactly what you need for the main journals that support the crankshaft. The STDX sizing is a practical choice for many engine builds where the crankshaft may have been ground undersize during machining. This set is designed to fit right into place, making your engine assembly process more straightforward.