What does '0.010 inch undersize' mean for these bearings?

This means the bearings are manufactured to be 0.010 inches smaller in diameter than a standard, or 'mainline', bearing. Your crankshaft journals must be machined down to this specific undersize dimension for the bearings to fit correctly and function as intended.

What is the advantage of tri-metal construction?

Tri-metal bearings use three layers of material, typically a steel backing for strength, a copper-lead alloy for load carrying, and a soft overlay like babbitt for conformability and embeddability. This combination offers a good balance of durability and the ability to adapt to the crankshaft surface.

Do these bearings come with installation instructions?

While these bearings are designed as a direct replacement, it is always recommended to refer to the specific service manual for your vehicle's make and model for detailed installation procedures and torque specifications.

ACL High Performance Rod Bearing Set 4B603H-10

Name: ACL Ford/Lotus 1500/1600 OHV/Twin Cam 010 Oversized High Performance Rod Bearing Set
Brand: ACL
Price: 54.90 USD
Availability: InStock

ACL Ford/Lotus 1500/1600 OHV/Twin Cam 010 Oversized High Performance Rod Bearing Set

$54.90

On Backorder

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

ACL Ford/Lotus 1500/1600 OHV/Twin Cam 0.010" Oversized High Performance Rod Bearing Set.

Key Features

Fits 1959-1975 Ford, Lotus, Mercury, Morgan, Sabra, and TVR models.
0.010 inch undersize rod bearing set.
Tri-metal construction for improved strength and conformability.
Designed for high-performance and demanding applications.
Helps reduce friction and wear in the engine.

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Will this fit your vehicle?

Product Details

ACL has been making engine bearings for decades, and this high-performance rod bearing set for your Ford, Lotus, or other classic vehicle is one of their staples. These bearings are built to handle more stress than stock, making them a solid choice if you're rebuilding an engine or looking to improve its durability under load. They are 0.010 inch undersize, which is important to know if you're reconditioning your crankshaft – it needs to be machined to match this size for a proper fit.

What sets these apart is their construction. ACL uses a tri-metal material that offers a good balance of strength and conformability, meaning it can adapt to slight imperfections in the crankshaft journal while still providing solid support. This helps reduce friction and wear, especially in engines that see harder use. They're a popular choice for performance builds or for anyone wanting a well-built replacement for their classic engine.

When installing these bearings, make sure your crankshaft journals are clean and properly machined to the 0.010 inch undersize. It's also a good idea to use a quality assembly lube to help protect the bearings during initial startup. If you're doing a full engine rebuild, these rod bearings are a critical component to get right.