ACL bearings are used for tuning and engine upgrades where you want better quality with higher bearing capacity than normal standard bearings. Improvements of material, dynamic thickness, heat conduction, oil grooves and oil distribution are some of the points that make ACL one of the leading bearing manufacturers. Bearing data Part number: 6B2390HX Bearing size: STD Bearing half type: Identical halves Bearing material: F781 Technical data (mm) Max overall length: 17.1 Max shaft size: 49.974 Max tunnel size: 53.011 Max vertical oil clearance: 0.086 Max wall at crown: 1.49 Min shaft size: 49.961 Min tunnel size: 53 Min vertical oil clearance: 0.046 Technical data (in) Max overall length: 0.673227006 Max shaft size: 1.967476398 Max tunnel size: 2.087043089 Max vertical oil clearance: 0.00338582 Max wall at crown: 0.058661301 Min shaft size: 1.966964588 Min tunnel size: 2.086610019 Min vertical oil clearance: 0.00181102 Engine code RB30E / RB30ET / RB30S / VE30DE / VG30DE / VG30DET / VG30