What does '.001 Oversize' mean for these main bearings?

This means the bearings are manufactured to be 0.001 inches larger in diameter than standard size. This is necessary when the crankshaft's main journals have been machined down (ground undersize) to remove wear or imperfections.

What is the CT-1 coating on these ACL bearings?

The CT-1 coating is a special surface treatment applied to the bearing material. It helps to provide better initial lubrication during engine startup and can contribute to reduced friction during operation.

What is the material of these main bearings?

These ACL main bearings are made from a strong tri-metal material. This type of construction is known for its ability to handle significant loads and provide good durability in engine applications.

ACL Ford 221/255/260/289/302 Windsor 5.0L .001 Oversized Size Main Bearing Set - CT-1 Coated

Specifications

Brand: ACL
Part #: 5M590HC-01
UPC: 9315726469187

ACL Ford 221/255/260/289/302 Windsor 5.0L .001 Oversized Size Main Bearing Set - CT-1 Coated

Name: ACL Ford 221/255/260/289/302 Windsor 5.0L .001 Oversized Size Main Bearing Set - CT-1 Coated
Brand: ACL
Price: 151.97 USD
Availability: InStock

$151.97

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Key Features

Fits 1962-1968 AC Shelby Cobra, 1963 Ford 300, 1966-1968 Ford Bronco, 1962-1967 Ford Country Sedan, 1962-1967 Ford Country Squire, 1964-1967 Ford Custom, 1962-1967 Ford Fairlane, 1962-1965 Ford Falcon Sedan Delivery, 1962-1968 Ford Falcon, 1964-1969 Ford GT40, 1962-1964 Ford Galaxie 500, 1963-1967 Ford Galaxie, 1965-1967 Ford LTD, 1964-1968 Ford Mustang, 1962-1967 Ford Ranch Wagon, 1962-1967 Ford Ranchero, 1963-1964 Ford Sprint, 1964-1965 Griffith 200, 1964-1967 Mercury Caliente, 1966-1967 Mercury Capri, 1962-1968 Mercury Comet, 1967 Mercury Commuter, 1967-1968 Mercury Cougar, 1963 Mercury Country Cruiser, 1964-1968 Mercury Cyclone, 1962-1963 Mercury Meteor, 1968 Mercury Montego, 1962-1967 Mercury Villager, 1966-1967 Mercury Voyager, 1967-1968 Omega Omega, 1962-1968 Shelby Cobra, 1964-1967 Sunbeam Tiger, 1964-1966 TVR Griffith, and 1967-1968 TVR Tuscan.
This set is .001 inch oversize, intended for crankshafts that have been machined undersize.
Features a CT-1 coating to aid in initial lubrication and reduce friction.
Constructed from a durable tri-metal material for good load capacity.
Designed for Ford 221, 255, 260, 289, and 5.0L Windsor V8 engines.

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Will this fit your vehicle?

Product Details

When you're rebuilding a classic Ford Windsor V8, getting the main bearings right is critical. This ACL main bearing set is specifically sized at .001 inch oversize, meaning it's meant for crankshafts that have been machined down by that amount to clean up wear. The CT-1 coating on these bearings is a unique feature that helps with initial startup lubrication and can reduce friction over time, which is especially important in high-performance or heavily used engines.

ACL has been making engine bearings for a long time, and they build these to handle the demands of these classic engines. They're made from a strong tri-metal material that offers good load-carrying capacity and durability. Because these are .001 inch oversize, they're intended for engines where the main journals on the crankshaft have been ground undersize to remove imperfections or wear. If your crankshaft has been measured and confirmed to need this specific size, these bearings will help you achieve proper clearances for a healthy engine build.

This set includes all the main bearings needed for your Ford 221, 255, 260, 289, or 5.0L Windsor V8. It's a solid option for anyone looking to restore or enhance their classic Ford, Mercury, or Shelby vehicle. Make sure to confirm your crankshaft journal measurements before ordering to ensure this .001 oversize set is the correct choice for your rebuild.