What is the main purpose of engine main bearings?

Main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while handling the significant forces generated during combustion. Replacing them is a key part of any bottom-end engine rebuild.

What does 'Race Series' mean for these ACL bearings?

The Race Series designation indicates these bearings are built with enhanced materials and construction for higher performance applications. They are designed to withstand greater loads and stresses compared to standard OEM bearings.

Do these bearings come with any specific installation instructions?

While these bearings are designed as a direct fit, it's always recommended to refer to the manufacturer's installation guidelines. Proper lubrication and adherence to torque specifications are critical for bearing longevity and engine health.

1979 Ford Mustang Main Bearings | ACL Race Series 5M1117H-20

Name: ACL Ford 4 2300 (Single Spark Plug engines) Race Series Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-4-2300-single-spark-plug-engines-race-series-engine-crankshaft-main-t14-631039
Price: 125.52 USD
Availability: BackOrder

ACL Ford 4 2300 (Single Spark Plug engines) Race Series Engine Crankshaft Main Bearing Set

$125.52

On Backorder

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

Fits 1979 Ford Mustang. ACL Race Series main bearing set for single spark plug engines.

Key Features

Fits 1979 Ford Mustang.
ACL Race Series main bearing set.
Designed for single spark plug engines.
Tri-metal construction with lead-indium overlay for strength.
Helps protect the crankshaft under load.

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Fits this vehicle

Ford Mustang 1979

Product Details

Rebuilding the top end of your 1979 Mustang? If you're getting into the bottom end, a solid set of main bearings is crucial for keeping that engine running smoothly. This Race Series set from ACL is built to handle the demands of a performance engine, whether you're building for the street or the track.

ACL has been making engine bearings for a long time, and their Race Series bearings are a popular choice when you need something a step up from stock. They use a tri-metal construction with a lead-indium overlay, which is known for its strength and ability to handle higher loads. This means they can handle the increased stress that comes with a performance build, helping to protect your crankshaft. The 5M1117H-20 set is specifically made for the 1979 Ford Mustang with single spark plug engines, ensuring it fits right.

When you're putting an engine back together, especially one that's been rebuilt or modified, it's always a good idea to check your crankshaft journals for any imperfections before installing new bearings. Make sure to follow the manufacturer's lubrication and installation guidelines carefully to get the most out of these bearings.