What does the STDX size mean for these bearings?

The STDX designation means these bearings are 0.040 inch undersize. This is used when the crankshaft has been machined down by 0.040 inches to provide a fresh surface for the new bearings.

What is the pMax Black material?

pMax Black is King Engine Bearings' racing line material. It's a tri-metal construction designed for enhanced strength and durability to handle the higher loads and temperatures found in performance and racing engines.

Are these bearings suitable for a stock engine rebuild?

While these bearings feature a high-performance material, they are specifically sized as STDX (0.040 inch undersize). They are best suited for engines where the crankshaft has been professionally machined to this specific size, often as part of a performance or racing build.

Specifications

Brand: King Engine Bearings
Part #: MB5082XPSTDX
UPC: 611500574481

King Engine Bearings BMW M40/M42/M43 1.6L/1.8L (STDX Size) Crankshaft Main Bearing Set

Name: King Engine Bearings BMW M40/M42/M43 1.6L/1.8L (STDX Size) Crankshaft Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-m40-m42-m43-1-6l-1-8l-stdx-size-cr-t14-170017
Price: 229.40 USD
Availability: BackOrder

$229.40

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King Engine Bearings crankshaft main bearing set for BMW M40, M42, M43 1.6L/1.8L engines. STDX size.

Key Features

Fits BMW M40, M42, and M43 engines with 1.6L and 1.8L displacements.
STDX size crankshaft main bearing set, which is 0.040 inch undersize.
Features King's pMax Black tri-metal material, their racing line.
Designed for improved strength and durability in high-load applications.
Supports the crankshaft within the engine block for smooth rotation.

This crankshaft main bearing set is designed for BMW M40, M42, and M43 engines with 1.6L and 1.8L displacements.

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About this part

Product Details

This is a King Engine Bearings crankshaft main bearing set, specifically the STDX size, designed for BMW M40, M42, and M43 engines with 1.6L and 1.8L displacements. These bearings are a crucial part of your engine's rotating assembly, supporting the crankshaft as it spins within the engine block. If you're rebuilding the bottom end of one of these BMW engines, especially for performance or racing applications, these bearings are a solid option.

The MB5082XPSTDX set features King's pMax Black tri-metal material, which is their racing line designed for demanding conditions. This material offers improved strength and durability compared to standard bearings, helping to withstand higher loads and temperatures often found in performance builds. The STDX size indicates these are 0.040 inch undersize bearings, meaning they are intended for crankshafts that have been machined down by 0.040 inches to ensure a fresh, perfectly sized surface for the new bearings.

When installing these bearings, it's important to ensure the crankshaft journals are clean and properly machined to the STDX size. Proper oil clearance is critical for bearing longevity and engine health, so always refer to the manufacturer's specifications for your specific engine build.