What does the +.25mm size mean for these bearings?

The +.25mm designation indicates that these bearings are slightly larger than standard size. They are intended for use in an engine where the connecting rod journals have been machined down by 0.25mm (approximately 0.010 inches) during a rebuild or repair process.

What is the PMaxBlack overlay and Radialock design?

PMaxBlack is King's proprietary overlay material that provides enhanced load-carrying capabilities. Radialock refers to a design feature that helps the bearing achieve and maintain the correct crush height, ensuring it seats securely in the connecting rod housing.

Are these bearings suitable for stock engines or only performance builds?

While these bearings are marketed as performance bearings due to their advanced materials and design, they can also be used in stock engine rebuilds where an engine has been machined to the +.25mm size. Their improved load capacity can offer an added margin of durability.

Specifications

Brand: King Engine Bearings
Part #: CR4002XP0.25
UPC: 611500542916

King Ford/Mazda DOHC 16 Valve/SOHC 16 Valve/SOHC 8 Valve Performance Rod Bearing Set - Size +.25mm

Name: King Ford/Mazda DOHC 16 Valve/SOHC 16 Valve/SOHC 8 Valve Performance Rod Bearing Set - Size +.25mm
Brand: King Engine Bearings
SKU: king-engine-bearings-king-ford-mazda-dohc-16-valve-sohc-16-valve-sohc-8-valve-pe-t14-4379013
Price: 63.83 USD
Availability: InStock

$63.83

Only 7 left in stock

King Ford/Mazda DOHC/SOHC performance rod bearing set, size +.25mm. Features PMaxBlack for superior load capacity.

Key Features

Fits Ford Escort (1991-1996), Mazda 323 (1986-1994), Mazda Miata (1994-1997, 1999-2005), Mazda Protege (1990-2001), Mercury Capri (1991-1994), and Mercury Tracer (1991-1996).
Features King's PMaxBlack overlay for superior load capacity.
Radialock design helps maintain optimal crush height for proper seating.
Constructed with a tri-metal copper-based material for durability.
This is a +.25mm undersize bearing set, intended for use in engines machined to that specification.

⚠️ 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

These King Engine Bearings rod bearings are built with a tri-metal copper-based material, a solid foundation for handling the demands of performance engines. They're specifically sized at +.25mm, meaning they're meant for engines that have already been machined to that size during a rebuild. This set is designed for a range of Ford and Mazda vehicles, including popular models like the Mazda Miata, Mazda Protege, and Ford Escort, covering various DOHC and SOHC engine configurations.

What sets these bearings apart is King's PMaxBlack overlay, which offers superior load capacity, and the Radialock design that helps maintain optimal crush height. This combination ensures the bearings seat properly and can withstand higher pressures, which is crucial when you're pushing an engine harder than stock. They are well-built components for anyone rebuilding or refreshing a performance engine.