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: 4B603H Bearing size: STD Bearing half type: Upper & lower Bearing material: F781 Technical data (mm) Max overall length: 22.35 Max shaft size: 49.212 Max tunnel size: 52.908 Max vertical oil clearance: 0.064 Max wall at crown: 1.83 Min shaft size: 49.2 Min tunnel size: 52.896 Min vertical oil clearance: 0.024 Technical data (in) Max overall length: 0.879919508 Max shaft size: 1.937476458 Max tunnel size: 2.082987979 Max vertical oil clearance: 0.00251968 Max wall at crown: 0.072047101 Min shaft size: 1.937004018 Min tunnel size: 2.082515539 Min vertical oil clearance: 0.00094488 Engine code 1098cc Kent / 1297cc Kent / 1298cc Kent X Flow / 109E / 149