What does 'extra oil clearance' mean for my engine?

Extra oil clearance means there's a slightly larger gap between the bearing and the crankshaft journal. This allows for more oil to flow through, which helps keep the bearing and journal cooler and better lubricated, especially in high-performance engines that generate more heat and stress.

Do I need to have my crankshaft ground for these bearings?

No, these are standard (STD) size bearings. They are designed to fit crankshaft journals that are still within their original factory specifications. If your crankshaft has been previously ground undersize, you would need to order the corresponding undersize bearings.

What other parts might I need when installing main bearings?

When replacing main bearings, it's highly recommended to also replace the rod bearings, oil pump, and oil pan gasket. You'll also need assembly lube to coat the new bearings before installation to ensure proper lubrication on initial startup.

ACL Ford 221/255/260/289/302 Windsor/Windsor 5.0L STD Size w/ Extra Oil Clearance Main Bearing Set

Specifications

Brand: ACL
Part #: 5M590HX-STD
UPC: 9315726188163

ACL Ford 221/255/260/289/302 Windsor/Windsor 5.0L STD Size w/ Extra Oil Clearance Main Bearing Set

Name: ACL Ford 221/255/260/289/302 Windsor/Windsor 5.0L STD Size w/ Extra Oil Clearance Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-221-255-260-289-302-windsor-windsor-5-0l-std-size-w-extra-oil-clear-t14-142682
Price: 104.45 USD
Availability: InStock

$104.45

Only 2 left in stock

ACL Ford 221/255/260/289/302 Windsor/Windsor 5.0L STD Size w/ Extra Oil Clearance Main Bearing Set. Offers extra oil clearance for performance builds.

Key Features

Fits 1962-1968 AC Shelby Cobra, 1963 Ford 300, 1966-1968 Ford Bronco, and many more Ford and Mercury vehicles.
Standard (STD) size for direct fitment on factory-spec crankshaft journals.
Features extra oil clearance to help maintain lubrication under high-performance conditions.
Well-built by ACL, a popular manufacturer of engine bearings.
Designed for Ford 221, 255, 260, 289, and 5.0L Windsor V8 engines.

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Will this fit your vehicle?

Product Details

Already running a built Ford Windsor engine? This main bearing set is the next piece of the puzzle for your performance build. ACL is a well-known name in engine bearings, and this set is made with their experience in mind. These bearings are designed to handle the extra demands of a performance engine, offering a bit more oil clearance than stock. This extra space helps ensure that your crankshaft stays well-lubricated, even under high RPMs or heavy loads, which is crucial for preventing premature wear.

This particular set is for standard (STD) size crankshaft journals, meaning you don't need to have your crank ground down if it's still within factory tolerances. The extra oil clearance is a smart feature for engines that have been modified for more power, as it helps manage the increased heat and stress. ACL uses quality materials to ensure these bearings can stand up to the rigors of performance driving, giving you peace of mind that your engine's bottom end is well-supported.

When you're rebuilding or upgrading a classic Ford V8, getting the right bearings is essential. This set fits a wide range of Ford 221, 255, 260, 289, and 5.0L Windsor engines, covering many popular classic applications. Make sure to check the fitment list to confirm it's the right match for your specific vehicle.