When it comes to pushing your engine to the limit, you need bearings that can keep up. That’s where these ACL Race Series Engine Bearings come into play. They’ve got the right mix of design and materials to handle those high RPMs without breaking a sweat. Whether you’re running a 4, 6, or 8-cylinder setup, you’ll appreciate what these bearings bring to the table.

What Makes These Bearings Stand Out?

• Strong Overlay Plate: The overlay is thinner but tougher, which means it can handle fatigue better. This is crucial when you’re really pushing your engine.
• Hardened Steel Backs: All the rod bearings come with hardened steel backs. This helps support the bearing lining and keeps everything snug in the housing.
• Increased Crush: You’ll notice better bearing retention thanks to the added crush, so you don’t have to worry about them shifting around under pressure.
• No Flash Plating: They’ve eliminated flash plating on the backs, which helps with heat transfer and keeps the grip between the bearings and the housing solid.
• Increased Eccentricity: This feature compensates for bore distortion at high RPMs and helps form those all-important hydrodynamic oil films.
• 3/4 Grooved Main Bearings: These optimize the load-carrying surface area and oil flow to the conrod bearings, which is key for performance.
• Tight Wall Tolerances: Consistent clearances are a must, and these bearings deliver on that front.
• Enlarged ID Chamfers: They’ve got larger chamfers on the edges to accommodate those beefy fillet radii on performance crankshafts.

Specifications You Should Know:

• Sizes Available: STD, .025, .25, .50
• Oil Clearance: Standard
• Half Type: Identical Halves
• Material: Tri-metal with Hardened Steel Backs
• Min Std Shaft Size: 1.9661 in / 49.938 mm
• Max Std Shaft Size: 1.9668 in / 49.956 mm
• Min Std Tunnel Size: 2.1259 in / 53.998 mm
• Max Std Tunnel Size: 2.1267 in / 54.018 mm
• Max Wall at Crown: 0.0793 in / 2.013 mm
• Max Overall Length: 0.6941 in / 17.63 mm

Perfect Fitment:

If you’re driving a Mazda 323 (1986-2003) or a Mazda MX-3 (1993-1998), you’re in luck. These bearings are designed to fit perfectly, especially if you’re using the 5M8353H-.25 ACL Mazda B6/BP/BP-T 1.6/1.8L setup with .25mm oversized high-performance main bearings.

So, if you’re serious about performance and want bearings that won’t let you down when it counts, these ACL Race Series Engine Bearings are worth a look. They combine solid engineering with real-world performance, making them a smart choice for your next build.