What does 'STDX' size mean for these bearings?

STDX indicates that these bearings are standard size, meaning they are intended for use with a crankshaft journal that is within the manufacturer's original specifications. They are not undersized or oversized.

What is the pMax Black overlay?

The pMax Black overlay is an advanced coating applied to these bearings. It's designed to help reduce friction and improve wear resistance, which is particularly beneficial in high-performance or demanding engine applications.

Are these bearings suitable for a daily driver or only for racing?

While designed as race bearings and featuring advanced materials like the pMax Black overlay, they are built with Trimetal construction which offers good durability. Many builders use these types of bearings in performance street engines where increased reliability under load is desired.

Specifications

Brand: King Engine Bearings
Part #: CR4596XPSTDX
UPC: 611500569913

King Engine Bearings BMW S14B20/S14B23/S14B25 (Size STDX) Connecting Rod Bearing Set

Name: King Engine Bearings BMW S14B20/S14B23/S14B25 (Size STDX) Connecting Rod Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-s14b20-s14b23-s14b25-size-stdx-con-t14-769890
Price: 139.05 USD
Availability: BackOrder

$139.05

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Fits 1988-1991 BMW M3. King Engine Bearings XP STDX connecting rod bearing set for S14 engines.

Key Features

Fits 1988-1991 BMW M3.
Designed for BMW S14B20, S14B23, and S14B25 engines.
These are race-style connecting rod bearings.
Features Trimetal construction for durability.
Includes pMax Black overlay for improved friction reduction and wear resistance.
STDX size indicates standard size (0.000 inch).

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About this part

Product Details

King Engine Bearings is well-known for making solid engine bearings. If you're rebuilding the engine in your 1988-1991 BMW M3, especially with the S14B20, S14B23, or S14B25 engine, these connecting rod bearings are a strong choice. They are designed as race bearings, meaning they're built to handle higher performance demands than standard bearings.

These bearings use a Trimetal construction, which is a common and effective way to build performance bearings. The 'XP' in the part number signifies their pMax Black overlay, an advanced coating that helps reduce friction and wear, especially under demanding conditions. The STDX size indicates these are 0.000 inch standard size bearings, meaning they are intended for a crankshaft journal that is within factory specifications. When installing, always ensure your crankshaft journals are clean and within the correct size range for these bearings to perform as intended.