If you’re diving into the world of high-performance engines, you’re going to want to check out these ACL Race Series Engine Bearings. They’re not just any bearings; they’re crafted with a unique blend of design and metallurgy that really stands up to the rigors of high RPM conditions. Whether you’ve got a 4, 6, or 8-cylinder setup, these bearings are tailored to fit a bunch of popular applications, so you’re likely covered.

What makes these bearings stand out?

• First off, the high-strength overlay plate is thinner, which actually boosts fatigue resistance. This means you can push your engine harder without worrying about premature wear.
• All rod bearings come with hardened steel backs. This not only supports the lining but also helps keep everything snug in the housing—no one wants to deal with bearings that slip.
• They’ve increased the crush factor, which enhances bearing retention. It’s a little detail that makes a big difference when you’re revving high.
• No flash plating on the back, which improves heat transfer and helps the bearings grip the housing better. That’s crucial for keeping everything cool under pressure.
• With increased eccentricity, these bearings can handle bore distortion at high RPMs, which is essential for creating those hydrodynamic oil films that keep things lubricated.
• The 3/4 grooved main bearings optimize the load-bearing surface area and oil flow to the conrod bearings. More oil where it counts, right?
• Consistent wall tolerances mean you’ll maintain clearances that are tight and reliable—no surprises here.
• And let’s not forget the enlarged ID chamfers on the edges. They’re designed to accommodate those large fillet radii on performance crankshafts, so you can rest easy knowing everything fits just right.

Here are some specs you might find useful:

• Sizes available: STD, .025, .25
• Oil clearance: Standard
• Half type: Identical halves
• Material: Tri-metal with hardened steel backs
• Min standard shaft size: 2.0462 in / 51.973 mm
• Max standard shaft size: 2.0467 in / 51.985 mm
• Min standard tunnel size: 2.2047 in / 56.000 mm
• Max standard tunnel size: 2.2054 in / 56.018 mm
• Max wall at crown: 0.0786 in / 1.996 mm
• Max overall length: 1.996 in / 18.00 mm

Fitment:

• Mitsubishi Evolution X (2008-2011)
• Mitsubishi Lancer (2002-2017) - 5M1237H-.025 ACL 08+ Mitsubishi 4B11T Evo X 0.025mm Oversized High Performance Main Bearing Set.

So, if you’re looking to keep your engine running smooth and strong, these ACL bearings are a solid choice. They’ve got the specs and the durability to back them up, making them a smart investment for anyone serious about performance.