What does the +.25 sizing mean for these bearings?

The +.25 sizing means these bearings are 0.00025 inches larger in diameter than a standard-sized bearing. This is used when the connecting rod journals have been machined down to this size during an engine rebuild.

What is the pmax black racing line?

The pmax black racing line from King Engine Bearings features a tri-metal construction. This design is intended for high-performance applications and offers improved durability under stress.

Are these bearings suitable for a stock engine rebuild?

While these are part of King's racing line, they can be used in a performance-oriented rebuild of a stock engine. Ensure the connecting rod journals are machined to the +.25 size specified for these bearings.

Specifications

Brand: King Engine Bearings
Part #: CR4507XP0.25
UPC: 611500556432

King Mazda MZR 2.3L 16v / Ford Duratec 2.3L 16v (Size +.25) Connecting Rod Bearing Set (Set of 4)

Name: King Mazda MZR 2.3L 16v / Ford Duratec 2.3L 16v (Size +.25) Connecting Rod Bearing Set (Set of 4)
Brand: King Engine Bearings
SKU: king-engine-bearings-king-mazda-mzr-2-3l-16v-ford-duratec-2-3l-16v-size-25-conne-t14-184940
Price: 83.99 USD
Availability: BackOrder

$83.99

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King connecting rod bearing set for Mazda MZR 2.3L and Ford Duratec 2.3L engines. Size +.25. Set of 4.

Key Features

This is a set of four connecting rod bearings.
The bearings are sized at +.25, meaning they are 0.00025 inches larger than standard.
This set is designed for Mazda MZR 2.3L 16v and Ford Duratec 2.3L 16v engines.
Features King's pmax black racing line with tri-metal construction.
Fits a wide range of Ford, Mazda, and Mercury vehicles.

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About this part

Product Details

This product is a set of four connecting rod bearings, sized at +.25. These bearings are part of King Engine Bearings' pmax black racing line, featuring a tri-metal construction designed for demanding use.

These bearings are built for Mazda MZR 2.3L 16v and Ford Duratec 2.3L 16v engines. They fit a range of vehicles including the Ford Escape, Mazda 3, and Mercury Milan. The +.25 sizing indicates they are slightly larger than standard, intended for engines that have been machined to this specification during a rebuild.

If you're rebuilding the bottom end of your Mazda or Ford 2.3L engine and need connecting rod bearings, this set from King Engine Bearings offers a well-built option from their performance racing line.