King Bearings BMW N55B30A/N53B30A/N52B30A Main Bearing Set MB7776S

King Bearings SKU: kingMB7776S


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BMW STD Main Bearing Set - King MB7776SI

Improve your engine's performance and replace old worn out OEM bearings with these long-lasting, high-quality Main Crankshaft Bearings by King Engine Bearings. Main crankshaft bearings hold your crankshaft in place, preventing it from being dislodged by forces from the pistons, and instead converting the reciprocating movement into rotation. King Connecting Rod Bearing Sets are constructed from various high-quality alloys, crafted carefully by a highly qualified team of professionals who are highly experienced in the Industry.


  • Only superior materials are used in King's bearings

  • Innovative production technology ensures a perfect fit

  • Advanced R&D software and analysis expertise

  • Crafted by experienced engineers and an advanced technical team


  • Crankshaft - 0.000/0.000

  • Housing - 0.000/61.036 | 0.000/70.053

  • Max Wall - 2.499

  • Max Length - 18.801 | 19.799 | 22.400


King Engine Bearings was founded in 1960 with one objective: to supply the highest quality bearings available in the marketplace.

By specializing in engine bearings, King has built an extensive product offering that includes a wide range of engine bearings for automobiles, light-duty and heavy-duty trucks, marine, aviation, standby power and many other types of internal combustion engines. Every King bearing utilizes the highest quality materials and the most advanced designs to ensure complete customer satisfaction.

From concept to final product, everything is done under one roof. This allows King to produce bearings more efficiently and with more accuracy in order to keep up with the needs of our customers. During production, all bearings must pass rigorous quality control checkpoints throughout the entire process. This stringent system of multiple quality checks ensures that only the highest quality bearings ever make it into our customers’ hands.