If you’re looking to give your engine a serious upgrade, the ACL Race Series Engine Bearings are where it’s at. These aren’t just any bearings; they’re built for the kind of high RPM action that performance enthusiasts crave. Designed with a unique blend of materials and engineering know-how, they’re perfect for those who want reliability and power without compromise.

So, what makes these bearings special? For starters, they feature a high-strength overlay plate that’s thinner than your average bearing. This isn’t just about saving weight; it actually improves fatigue properties, so you can push your engine harder without worrying about wear and tear. Plus, all rod bearings come with hardened steel backs, which means they provide solid support for the lining and help keep everything snug in the housing.

One of the standout features is the increased crush. This means better retention, so you won’t have to stress about the bearings shifting around when you’re really getting on it. They’ve ditched the flash plating on the back, too—this is a game changer for heat transfer, allowing for better grip between the bearings and the housing. Trust me, this is crucial when you’re running at higher temps.

Another cool aspect is the increased eccentricity. This helps compensate for bore distortion at high RPMs and aids in forming those all-important hydrodynamic oil films. And for those of you running performance crankshafts, the 3/4 grooved main bearings optimize the load-carrying surface area and oil flow to the conrod bearings, which is something you definitely want when you’re pushing your limits.

The tight and consistent wall tolerances help you maintain those crucial clearances, which is vital for engine performance. And if you’ve got a crankshaft with a large fillet radius, the enlarged ID chamfers on the bearing edges have got you covered.

Here are some specs to keep in mind:

• Sizes: STD, .025, .25
• Oil Clearance: Standard
• Half Type: Identical Halves
• Material: Tri-metal Hardened Steel Backs
• Min Std Shaft Size: 1.8802in / 47.758 mm
• Max Std Shaft Size: 1.8810in / 47.778 mm
• Min Std Tunnel Size: 1.9921in / 50.600 mm
• Max Std Tunnel Size: 1.9929in / 50.619 mm
• Max Wall at Crown: 0.0553in / 1.405 mm
• Max Overall Length: 0.748in / 19.00 mm

For those running VW 14i/16i/18t/20TFSi/20TSI engines, this standard size high-performance rod bearing set (part number 4B1609H-STD) is a solid choice. You’ll be hard-pressed to find a better option for keeping your engine running smoothly under pressure.