What does the STDX sizing mean for these bearings?

The STDX sizing indicates that these bearings are 0.000000 inches undersize. This means they are a standard size, intended for use when the crankshaft journals are within their specified tolerance and do not require machining to a smaller size.

Why is oil clearance important for main bearings?

Proper oil clearance is critical for engine health. It allows a thin film of oil to surround the bearing, cushioning the load between the crankshaft and the bearing surface. This prevents metal-on-metal contact, reduces friction, and dissipates heat.

Are these bearings suitable for a stock Ecoboost 3.5L V6 engine?

Yes, King Engine Bearings are designed to meet or exceed OEM specifications for performance and durability. This set is intended for the Ford Ecoboost 3.5L V6 and is sized STDX for standard journal dimensions.

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Specifications

Brand: King Engine Bearings
Part #: MB4570MCSTDX
UPC: 611500630767

King Engine Bearings Ford Ecoboost 3.5L V6 (Size STDX) Main Bearing Set

Name: King Engine Bearings Ford Ecoboost 3.5L V6 (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-ecoboost-3-5l-v6-size-stdx-main-b-t14-770431
Price: 92.08 USD
Availability: BackOrder

$92.08

On Backorder

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Key Features

Main bearing set for Ford Ecoboost 3.5L V6 engines.
Size STDX (0.000000 inches undersize).
Designed for precise oil clearance in high-performance V6 engines.

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About this part

Product Details

King Engine Bearings is known for making well-built engine components, and this main bearing set for the Ford Ecoboost 3.5L V6 is no exception. If you're rebuilding or refreshing the bottom end of your Ecoboost engine, these bearings are designed to handle the demands of that powerful V6.

This particular set is sized STDX, which means they are 0.000000 inches undersize. This precise sizing is crucial for ensuring the correct oil clearance between the crankshaft and the main journals. Proper oil clearance is vital for lubricating the rotating assembly and preventing premature wear, especially in high-performance applications like the Ecoboost engine.