King Engine Bearings Main Bearing Set for BMW N55/N53/N52 B30A Size STDX

King Engine Bearings Main Bearing Set — BMW N55 / N53 / N52 B30A (Size STDX) Precision-engineered Size STDX delivers reliable crankshaft support and long-lasting performance for N55, N53, and N52 applications. Key Features Exact fit for BMW N55 B30A, N53 B30A and N52 B30A engines — simplifies installation and reduces break-in time. High-quality materials and multi-layer construction for enhanced fatigue resistance and wear protection. Consistent oil clearance to maintain optimal oil film and reduce friction under load. Durable finish resists corrosion and extends service life in demanding conditions. Benefits Restore factory tolerances and improve engine longevity. Reduce bearing noise and improve smoothness during operation. Trusted aftermarket option from a leading bearing manufacturer. Whether you're performing an engine rebuild or preventative maintenance, this King main bearing set provides the fitment, durability, and engineering needed to keep your BMW B30A engine running smoothly.