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: 4B8320H Bearing size: STD Bearing half type: Identical halves Bearing material: F781 Technical data (mm) Max overall length: 15.63 Max shaft size: 48 Max tunnel size: 51.02 Max vertical oil clearance: 0.038 Max wall at crown: 1.498 Min shaft size: 47.984 Min tunnel size: 51 Min vertical oil clearance: 0.01 Technical data (in) Max overall length: 0.615353106 Max shaft size: 1.889760017 Max tunnel size: 2.008657418 Max vertical oil clearance: 0.00149606 Max wall at crown: 0.058976261 Min shaft size: 1.889130097 Min tunnel size: 2.007870018 Min vertical oil clearance: 0.0003937 Engine code EJ15 / EJ16 / EJ18E / EJ205 / EJ20D / EJ20E / EJ20G / EJ20T / E