ACL BMW E30 M3 S14B20/23/25 I4 Connecting Rod Bearing Set (Size STD)

Already running a built S14 engine? This connecting rod bearing set from ACL is the next piece of the puzzle for your 1988-1991 BMW M3. These bearings are critical for maintaining the correct oil clearance between your connecting rods and crankshaft, which is essential for proper lubrication and preventing premature wear in high-performance or rebuilt engines.

ACL has been making engine bearings for a long time, and they know how to build them right. This set is manufactured to meet or exceed OEM specifications, ensuring a solid fit and reliable performance. They use a tri-metal construction that offers good durability and wear resistance, which is important for the demanding environment inside an engine. Since these are standard size, they're meant for engines where the crankshaft journals are still within factory tolerances, making them a straightforward replacement during an engine rebuild.

When you're rebuilding an S14 engine, getting the bearing clearances right is key. This set is designed to be a direct fit, so you can focus on the rest of your build. Make sure to clean your crankshaft journals thoroughly and follow the manufacturer's lubrication and installation instructions to get the best results.