What is the purpose of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They create a low-friction surface that allows the crankshaft to rotate smoothly while handling the immense forces generated during combustion.

What does the 'H-Series' designation mean for these bearings?

The H-Series designation typically refers to a specific design that Manley uses for enhanced oil control and lubrication. This design is often favored in performance applications where consistent oil flow is crucial for bearing longevity.

Are these bearings suitable for a stock 454 engine rebuild?

While these bearings are designed for performance applications, they can also be used in a stock 454 rebuild if you are looking for a well-built component. However, their primary advantage is in handling increased stress and RPMs found in performance engines.

Specifications

Brand: Manley Performance
Part #: 33040HX
UPC: 807298083483

Manley Main Bearing, BBC 454 MAIN BEARINGS H - SERIES

Name: Manley Main Bearing, BBC 454 MAIN BEARINGS H - SERIES
Brand: Manley Performance
SKU: manley-performance-manley-main-bearing-bbc-454-main-bearings-h-series-t14-881360
Price: 227.21 USD
Availability: BackOrder

$227.21

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Performance BBC 454 H-Series main bearings. Built for performance applications.

Key Features

Fits BBC 454 engines.
Manley Performance H-Series main bearings.
Designed for performance engine builds.
Helps ensure smooth crankshaft rotation.
Well-built for reliable lubrication under stress.

⚠️ 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

Manley Performance is known for making strong internal engine components, and these H-Series main bearings are a good example of that. If you're rebuilding a big block Chevrolet 454 engine, these bearings are designed to handle the demands of performance builds. They are a critical part of your engine's rotating assembly, ensuring the crankshaft spins smoothly within the block.

These bearings feature an H-series design, which is often chosen for its ability to manage oil flow and provide consistent lubrication under stress. This is important for keeping your engine cool and preventing premature wear, especially when you're pushing the engine harder than stock. They are well-built to be a reliable choice for your engine project.