What does STDX sizing mean for these bearings?

STDX sizing means these bearings are standard size, or 0.000 inch. They are intended for use with a crankshaft that is within the manufacturer's original specifications.

What is the pmax Black racing line?

The pmax Black racing line from King Engine Bearings features a tri-metal construction. These bearings are engineered for performance applications that experience higher loads and speeds than typical street use.

Are these bearings suitable for a daily driver?

While these are performance bearings designed for higher loads, they can be used in a daily driver if the engine is built or maintained to performance standards. Ensure your crankshaft journals are in excellent condition and within spec for optimal performance.

Specifications

Brand: King Engine Bearings
Part #: MB5278XPSTDX
UPC: 611500556616

King Engine Bearings Ford 140Ci /2.3Liter/L4 (Size STDX) Main Bearing Set

Name: King Engine Bearings Ford 140Ci /2.3Liter/L4 (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-140ci-2-3liter-l4-size-stdx-main--t14-770619
Price: 191.36 USD
Availability: BackOrder

$191.36

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King Engine Bearings is known for performance engine components. This XPSTDX Main Bearing Set is for Ford 2.3L L4 engines.

Key Features

Fits Ford 140ci / 2.3 Liter L4 engines.
STDX sizing indicates standard size (0.000 inch).
Part of King's pmax Black racing line.
Features a tri-metal construction for enhanced durability.
Designed for performance applications with higher loads and speeds.
Updated option compared to MB5278AM race bearings.

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Will this fit your vehicle?

About this part

Product Details

King Engine Bearings has a reputation for making solid engine components, and this XPSTDX Main Bearing Set is a great example. If you're working on a Ford 140 cubic inch or 2.3 Liter L4 engine, these bearings are designed to handle the demands of performance builds. They are part of King's pmax Black racing line, featuring a tri-metal construction that's built for higher loads and speeds.

This set is an updated option compared to their MB5278AM race bearings, offering improved performance characteristics. The STDX sizing indicates they are 0.000 inch, meaning they are standard size and meant to be used with a crankshaft that is within factory specifications. Proper installation is key with any performance bearing; ensure your crankshaft journals are clean and within tolerance for optimal performance and longevity.

This set fits a range of popular Ford and Mazda vehicles, including the Ford Mustang (1989-1993), Ford Ranger (1989-2001), and Merkur XR4Ti (1985-1989). Make sure to check the full fitment list to confirm compatibility with your specific application.