What is the purpose of main bearings in an engine?

Main bearings are crucial components that support the crankshaft within the engine block. They create a low-friction surface that allows the crankshaft to rotate smoothly while bearing the load of the engine's combustion cycles.

Why are these bearings made of aluminum alloy?

Aluminum alloy bearings are often chosen for performance engines because they conform well to the crankshaft journals and are effective at dissipating heat. This helps maintain consistent oil clearance and reduces the risk of bearing failure under stress.

What is the 'P Series' designation?

The 'P Series' designation from Manley refers to a specific design and material composition of their bearings, often tailored for performance applications. These bearings are engineered to provide reliable performance and durability for demanding engine builds.

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Specifications

Brand: Manley Performance
Part #: 33140

Manley 91-10 Ford Mustang 4.6L Series Windsor Aluminum Main Bearing

Name: Manley 91-10 Ford Mustang 4.6L Series Windsor Aluminum Main Bearing
Brand: Manley Performance
SKU: manley-performance-manley-91-10-ford-mustang-4-6l-series-windsor-aluminum-main-b-t14-372272
Price: 119.10 USD
Availability: BackOrder

$119.10

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Manley 91-10 Ford Mustang 4.6L Series Windsor Aluminum Main Bearing. Essential for engine rebuilds.

Key Features

Fits 1991-2010 Ford Mustang 4.6L Modular Windsor engines.
Manley P-Series main bearing set.
Aluminum alloy construction offers good conformability and heat management.
Designed for proper oil clearance during engine rebuilds.
Direct fit for factory main bearing locations.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This is a Manley P-Series main bearing set, specifically made for the Ford 4.6L Modular Windsor engine found in Mustangs from 1991 through 2010. Main bearings are critical components that sit between the crankshaft and the engine block, allowing the crankshaft to spin smoothly while supporting its weight. When you're rebuilding the bottom end of your 4.6L, a fresh set of well-built main bearings is a must-have to ensure proper oil clearance and long-term engine health.

Manley builds these bearings with an aluminum alloy, which is a popular choice for performance applications because it offers good conformability to the crankshaft journal and helps manage heat. They are designed to fit right into the factory main bearing locations, making installation straightforward if you're already deep into an engine build. Proper installation and ensuring the correct oil clearances are set are key to getting the most out of these bearings.