If you’re diving into the world of high-performance engines, you’ve probably heard about ACL’s Race Series Engine Bearings. These aren’t just any bearings; they’re crafted with a unique blend of design, metallurgy, and engineering that really speaks to what you need when you’re pushing your engine to the limit. Whether you’re working with a 4, 6, or 8-cylinder setup, these bearings are built to handle those higher RPMs without breaking a sweat.

Features You’ll Appreciate

• High Strength Overlay: These bearings come with a reduced thickness overlay that enhances fatigue properties. You want something that can handle the heat, right?
• Hardened Steel Backs: All rod bearings feature hardened steel backs. This isn’t just for show; it helps support the bearing lining and keeps everything snug in the housing.
• Increased Crush: A little extra crush means better bearing retention, so you don’t have to worry about them moving around when the engine’s revving high.
• Heat Transfer: Forget the flash plating on the back. These bearings are designed to improve heat transfer, which is crucial when you’re pushing your engine hard.
• Increased Eccentricity: This feature compensates for bore distortion at high RPMs, helping to form those all-important hydrodynamic oil films.
• Optimized Oil Flow: The 3/4 grooved main bearings are there to maximize load carrying surface area and ensure oil flows smoothly to the conrod bearings.
• Consistent Wall Tolerances: Tight tolerances mean you can maintain consistent clearances, which is key for performance.
• Chamfered Edges: Enlarged ID chamfers on the bearing edges accommodate larger fillet radii on performance crankshafts, making installation a breeze.

Specifications That Matter

• Size: STD
• Oil Clearance: +0.001" Extra
• Half Type: Upper & Lower
• Material: Tri-metal with hardened steel backs
• Min Std Shaft Size: 1.9661in / 49.938mm
• Max Std Shaft Size: 1.9668in / 49.956mm
• Min Std Tunnel Size: 2.1259in / 53.998mm
• Max Std Tunnel Size: 2.1267in / 54.018mm
• Max Wall at Crown: 0.0787in / 2mm
• Max Overall Length: 0.6941in / 17.63mm

What Cars Do They Fit?

These bearings are a solid choice for a few specific Mazda models:

• Mazda 323 (1986-2003)
• Mazda MX-3 (1993-1998)
• Mazda MX-6 (1988-1997)

So, if you’re looking to beef up your engine’s performance and reliability, these ACL Race Series Engine Bearings are definitely worth considering. They’re built to last and handle the kind of stress that comes with serious driving. Just make sure you’ve got the right fit for your setup!