Alright, let’s talk about the ACL Race Series Engine Bearings. If you’re pushing your engine to the limit, these are the bearings you want to have in your corner. They’re designed with serious performance in mind, and you can feel the difference when you hit those higher RPMs.

What sets these bearings apart? For starters, they feature a high-strength overlay plate that’s thinner than what you’d typically find. This means better fatigue resistance, which is crucial when you’re really laying down the power. And let’s not forget about the hardened steel backs on the rod bearings. They give the lining some serious support and help keep everything snug in the housing. No one wants to deal with bearings that are slipping around when the engine is roaring.

Speaking of snug fits, these bearings come with increased crush for improved retention. You’ll appreciate this when you’re pushing your engine hard, as it keeps everything in place. They’ve also eliminated flash plating on the back, which boosts heat transfer and improves the grip between the bearings and housing. It’s a simple tweak, but it makes a big difference in how well they perform under stress.

Now, if you’re worried about bore distortion at high RPMs, these bearings have got you covered with increased eccentricity. This helps form those all-important hydrodynamic oil films, keeping everything lubricated and happy. Plus, the 3/4 grooved main bearings optimize the load-carrying surface area and oil flow to the conrod bearings, which is just what you need for a smooth operation.

They also come with tight, consistent wall tolerances to help you maintain those clearances. And if you’re running a performance crankshaft, the enlarged ID chamfers on the bearing edges accommodate large fillet radii, so you won’t have to worry about any interference.

Specifications:

• Size: STD, 001, 010
• Oil Clearance: Standard
• Half Type: Upper & Lower
• Material: Tri-metal with Hardened Steel Backs
• Min Std Shaft Size: 2.2983in / 58.377 mm
• Max Std Shaft Size: 2.2993in / 58.402 mm
• Min Std Tunnel Size: 2.4906in / 63.261 mm
• Max Std Tunnel Size: 2.4916in / 63.287 mm
• Max Wall at Crown: 0.0954in / 2.423 mm
• Max Overall Length: 0.8067in / 20.49 mm

Products Fitment:

These bearings fit a range of classic Chevys:

• Chevrolet Bel Air 1950-1969 & 1971-1975 & 1981
• Chevrolet Caprice 1975-1996 & 2000-2017
• Chevrolet Corvette 1975-1982 & 1984-2013

If you’re running a V8 265/283/302/327, you’ll want to grab the 5M429P-STD ACL Chevrolet V8 Standard Size Main Bearing Set from '55 to '67. Trust me, these bearings are built to last and will keep your engine running strong.