When it comes to upgrading your Mitsubishi's performance, you can't overlook the importance of a solid suspension system. That's where Hygear Suspension steps in. These guys are all about enhancing the ride quality and handling of recreational vehicles, and trust me, they know their stuff. If you’re looking to hit the trails or the track, their suspension setups are designed to give you the stability and comfort you need to truly enjoy the ride.

Let’s dive into what makes these main bearings stand out. First off, they come with a high-strength overlay plate that’s thinner than what you might find elsewhere. This isn’t just for show; it actually improves fatigue properties, which means these bearings can take a beating without giving up on you. The hardened steel backs on all the rod bearings provide extra support for the lining, ensuring they stay put in the housing during those intense drives.

One of the coolest features is the increased crush for better bearing retention. You want your bearings to stay snug, especially when you’re pushing your engine to the limit. Plus, they’ve eliminated flash plating on the back of the bearings. This little tweak enhances heat transfer, which is crucial for keeping everything running smoothly and maximizing grip between the bearings and their housing.

Now, if you’re into high RPMs, you’ll appreciate the increased eccentricity. It helps compensate for any bore distortion and aids in forming those hydrodynamic oil films that keep everything lubricated under pressure. And with 3/4 grooved main bearings, you get optimized load-carrying surface area and improved oil flow to the conrod bearings. It’s all about keeping your engine happy.

These bearings also feature tight, consistent wall tolerances, which is key for maintaining clearances. And for those performance crankshafts, the enlarged ID chamfers on the bearing edges accommodate larger fillet radii, ensuring a perfect fit.

As for the specs, here’s what you’re looking at:

• Max Std Shaft Size: 2.2441" (57.000mm)
• Min Std Tunnel Size: 2.4016" (61.000mm)
• Max Overall Length: 0.827" (21.00mm) with 1186H/HX, 1.000" (25.40mm) with 1187H/HX Flange
• Oil Clearance: Standard
• Grade Type: Performance
• Width: 0.812"

These bearings fit a range of Mitsubishi models, including:

• Mitsubishi Galant DE | ES | LS | S (1994-2003)
• Mitsubishi Eclipse GS | GST | GSX | RS (1995-2005)
• Mitsubishi Eclipse Spyder GS | GST (1996-2005)
• Mitsubishi Expo Base | SP | LRV (1993-1995)
• Mitsubishi Lancer Evolution (2005-2006)
• Mitsubishi Montero Sport ES (1997-1999)

If you’re running a Mitsubishi Eclipse or Galant from the mid-90s to the early 2000s, these high-performance main bearings (ACL-5M1186H-STD) are a solid choice for your 4G64-S4 engine. They’re built to handle the demands of both daily driving and spirited racing, so you can trust them to keep your ride smooth and responsive.