Alright, let’s talk about these ACL Race Series Engine Bearings. If you’re looking to push your engine to the limit, these bad boys are designed for just that. They’re crafted with a unique blend of design and metallurgy that really gets what high-performance driving demands. Whether you've got a 4, 6, or 8-cylinder engine, these bearings are ready to handle the heat.

What makes them stand out?

• First off, the overlay plate is high strength but thinner, which means it can handle fatigue like a champ. This is crucial when you’re revving high and pushing your engine hard.
• All the rod bearings come with hardened steel backs. This not only supports the bearing lining but also keeps everything snug in the housing. No one wants their bearings shifting around when they’re making a tight turn or hitting the gas.
• They’ve increased the crush to enhance bearing retention too. It’s all about keeping things in place, especially when the RPMs start climbing.
• Plus, they’ve eliminated flash plating on the back. This little tweak helps with heat transfer and maximizes grip between the bearings and their housing. It’s a small change that makes a big difference.
• With increased eccentricity, these bearings can handle bore distortion at high RPMs better. This means you can count on solid hydrodynamic oil films forming, which is essential for keeping everything lubricated under pressure.
• The 3/4 grooved main bearings optimize the load-carrying surface area and oil flow to the conrod bearings. More oil where it counts means better performance.
• And don’t worry about fitment; these bearings come with tight, consistent wall tolerances to help you maintain those clearances you need for a smooth run.
• Finally, the enlarged ID chamfers on the edges accommodate those larger fillet radii on performance crankshafts. It’s all about making sure everything fits just right.

Specifications to note:

• Sizes available: STD, .025, .25
• Oil clearance is standard, so you know what you’re getting.
• Half type: identical halves, which is great for consistency.
• Material: tri-metal with hardened steel backs—this is where the durability comes from.
• Min standard shaft size: 2.6567" / 67.480 mm
• Max standard shaft size: 2.6577" / 67.506 mm
• Min standard tunnel size: 2.8504" / 72.400 mm
• Max standard tunnel size: 2.8512" / 72.421 mm
• Max wall at crown: 0.0962" / 2.443 mm
• Max overall length: 0.758" / 19.26 mm

Fitment: These bearings are a solid choice for a range of Ford models, including:

• Ford F-250 from 1953-1991 & 1993-2009
• Ford F-250 Super Duty from 2010-2021
• Ford Fairlane from 1955-1970

If you’re looking to upgrade your engine’s internals, these ACL Race Series Bearings are worth considering. They’re built for performance and durability, and they’ll keep your engine running smoothly even when you’re pushing it hard.