If you're diving into the world of performance engines, you know that every little detail counts. That’s where these ACL Race Series Engine Bearings come into play. Designed for those who push their engines to the limit, these bearings are built to handle the heat and stress of high RPMs without breaking a sweat. Whether you’re working on a 4, 6, or 8-cylinder setup, you’ll find a fit here that’s ready to take on the challenge.

What Makes These Bearings Stand Out?

• First off, the overlay plate is high-strength but thinner, which means it’s got better fatigue properties. This is crucial when you’re revving hard.
• All rod bearings come with hardened steel backs. This not only supports the bearing lining but also helps keep everything snug in the housing. Less chance of slippage when you’re pushing your engine hard.
• They’ve cranked up the crush for better bearing retention. You want these things to stay put, especially when the engine is screaming.
• No flash plating on the back means better heat transfer and a solid grip between the bearings and the housing. Heat management is key when you’re racing.
• Increased eccentricity helps compensate for bore distortion at high RPMs, which is a lifesaver for forming those hydrodynamic oil films you need for smooth operation.
• With 3/4 grooved main bearings, you’re optimizing the load-carrying surface area and ensuring oil flows efficiently to the conrod bearings. This is all about keeping things lubricated and cool.
• Consistent wall tolerances help you maintain clearances, which is vital for performance builds. You don’t want any surprises when you’re in the heat of the race.
• Plus, the enlarged ID chamfers on the edges accommodate larger fillet radii on performance crankshafts. Little details like this can make a big difference in high-performance setups.

Specifications:

• Size: STD, .25
• Oil Clearance: Standard
• Half Type: Upper & Lower
• Material: Tri-metal with hardened steel backs
• Min Std Shaft Size: 1.9678in / 49.982 mm
• Max Std Shaft Size: 1.9685in / 50.000 mm
• Min Std Tunnel Size: 2.1260in / 54.000 mm
• Max Std Tunnel Size: 2.1267in / 54.018 mm
• Max Wall at Crown: 0.0784in / 1.991 mm
• Max Overall Length: 0.753in / 19.13 mm

Fitment:
These bearings are specifically designed for the Mitsubishi Mirage models from 1992-2003 and 2014-2016. The part number is 5M8037H-.25, which means you’re looking at a +.25 oversized high-performance main bearing set for the 4G93 engine (1834CC). If you're aiming to squeeze every bit of performance out of your Mirage, these bearings are a solid choice.