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: 4B1606H Bearing size: STD Bearing half type: Identical halves Bearing material: F781 Technical data (mm) Max overall length: 19 Max shaft size: 47.778 Max tunnel size: 50.619 Max vertical oil clearance: 0.067 Max wall at crown: 1.405 Min shaft size: 47.758 Min tunnel size: 50.6 Min vertical oil clearance: 0.012 Technical data (in) Max overall length: 0.748030007 Max shaft size: 1.881019877 Max tunnel size: 1.992870048 Max vertical oil clearance: 0.00263779 Max wall at crown: 0.055314851 Min shaft size: 1.880232477 Min tunnel size: 1.992122018 Min vertical oil clearance: 0.00047244 Engine code 1B / 2B / 3A / 3D / 4B / 6A / 7A / AAD / AAE / AAR / AAS