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: 4B1146H Bearing size: .25 Bearing half type: Identical halves Bearing material: F781 Technical data (mm) Max overall length: 23.5 Max shaft size: 45 Max tunnel size: 48.02 Max vertical oil clearance: 0.067 Max wall at crown: 1.489 Min shaft size: 44.991 Min tunnel size: 48 Min vertical oil clearance: 0.022 Technical data (in) Max overall length: 0.925195009 Max shaft size: 1.771650016 Max tunnel size: 1.890547417 Max vertical oil clearance: 0.00263779 Max wall at crown: 0.058621931 Min shaft size: 1.771295686 Min tunnel size: 1.889760017 Min vertical oil clearance: 0.00086614 Engine code G4CN / G4CR / G4CS / 4D65 / 4D65-T / 4G30 / 4G31 / 4G32 / 4G33