Connecting Rod Bearing Set (0.25 mm / 0.10" Undersize) for Mazda 323 1.6L B6 Engines // R317A / KL4343SA333

High-performance Connecting Rod Bearing Set (Big End Bearings) specifically designed for Mazda 323 (BG series) and MX-5 Miata models equipped with the 1.6L B6 engine family. These are 0.25 mm Undersize (First Repair Size) bearings, cross-referenced as KL4343SA333, engineered for professional engine overhauls where the crankshaft rod journals have been ground. Manufactured from premium, high-fatigue resistant materials to ensure smooth reciprocating motion and maintain precise oil clearance under high-revving engine operations. Precision-made to meet or exceed OEM specifications, these bearings are essential for restoring the structural reliability of the rotating assembly during a professional rebuild.