If you're looking to give your engine the kind of love it deserves, you might want to check out these ACL Race Series Engine Bearings. These bad boys are crafted with a solid mix of design, metallurgy, and engineering, all aimed at delivering the performance you expect from top-notch Trimetal engine bearings. Trust me; these bearings are built to handle the high RPMs that come with pushing your vehicle to its limits.

What sets these bearings apart? For starters, the high-strength overlay plate has a reduced thickness, which really helps with fatigue properties—perfect for those intense drives. And let’s not forget about the hardened steel backs on all the rod bearings. They not only improve support for the bearing lining but also help keep everything snug in the housing. It’s all about that reliability when you’re out there on the road or track.

One thing I really appreciate is the increased crush that aids in bearing retention. Plus, they’ve done away with flash plating on the back, which means better heat transfer and a solid grip between the bearings and housing. If you’ve ever dealt with bore distortion at high RPM, you’ll love the increased eccentricity that helps form those hydrodynamic oil films. And for the main bearings, the 3/4 grooved design optimizes load-carrying surface area and oil flow to the conrod bearings—talk about smart engineering!

When it comes to specs, these bearings don’t disappoint. You can find them in sizes like STD, .025, and .25, with standard oil clearance. They come as identical halves made from tri-metal hardened steel backs, which gives you that extra durability. The tolerances are tight and consistent, making it easier to maintain those all-important clearances. And if you’re working with performance crankshafts, the enlarged ID chamfers on the bearing edges are a nice touch, accommodating those larger fillet radii.

Here are some quick specs for you: the minimum standard shaft size is 1.7709 in (44.98 mm), and the maximum is 1.7717 in (45 mm). As for tunnel sizes, you’re looking at a minimum of 1.8898 in (48 mm) and a maximum of 1.8906 in (48.02 mm). The max wall at the crown is 0.0592 in (1.504 mm), and the overall length is 0.7677 in (19.5 mm).

These bearings fit a range of applications, including the Honda Civic from 1992 to 2020, specifically the Acura B17A1/B18A1/B18B1 with a 0.25mm oversized high-performance rod bearing set. If you’re serious about performance and reliability, these bearings are definitely worth considering.