What is the STDX size designation?

The STDX designation indicates that these bearings are 0.040 inches undersize. This means they are intended for crankshaft journals that have been machined down by 0.040 inches during an engine rebuild.

What is the PMaxBlack material?

PMaxBlack is a proprietary material developed by King Engine Bearings. It is a tri-metal copper-based material engineered for superior load capacity, making it suitable for performance applications.

Does this bearing set come with new rod bolts?

This product includes a set of performance connecting rod bearings. New rod bolts are not included with this bearing set; they are typically purchased separately.

Specifications

Brand: King Engine Bearings
Part #: CR6640XPSTDX
UPC: 611500542701

King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L Performance Rod Bearing Set - Size STDX

Name: King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L Performance Rod Bearing Set - Size STDX
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-m20-m50-2-0l-2-5l-2-7l-performance-t14-4339646
Price: 140.15 USD
Availability: BackOrder

$140.15

On Backorder — Expected to ship by May 10, 2026

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

King Engine Bearings performance rod bearing set for BMW M20/M50 engines. Size STDX. Verified fitment.

Key Features

Fits 24+ vehicle make/model combinations.
Includes a set of performance connecting rod bearings.
Features King's PMaxBlack material for superior load capacity.
Utilizes Radialock design for optimal crush height.
Constructed with a tri-metal copper-based material.
Bearing size is STDX, which is an undersize bearing.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This is a set of performance connecting rod bearings from King Engine Bearings, specifically sized STDX. These bearings are designed for BMW M20, M50 engines with displacements of 2.0L, 2.5L, and 2.7L. They are a well-built component for rebuilding or enhancing your engine's bottom end.

King Engine Bearings specializes in creating high-quality engine bearings, and this set features their PMaxBlack material, which offers superior load capacity. The Radialock design helps achieve optimal crush height, ensuring a snug fit within the connecting rod. The tri-metal copper-based construction is chosen for its durability and performance under demanding conditions.

This set fits a wide range of BMW models, including popular choices like the E30 325i, E36 328is, and E39 525i. Always refer to the detailed fitment guide to confirm compatibility with your specific vehicle.