king mb5243xp race crank main bearings for nissan sr20det sr20de sr20 standard. This listing is for one set of Brand New King Race Crank Main Bearings for the Nissan SR20DE & SR20DET engines found in the S13, S14, S15, RB14 GTIR, Sentra, NX2000, Infiniti G20, Bluebird, Primera, Almero, Lucino, R'nessa & Serena Size = Standard Part Number = MB5243XP.