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: 8B634H Bearing size: 1 Bearing half type: Upper & lower Bearing material: F781 Technical data (mm) Max overall length: 18.44 Max shaft size: 53.939 Max tunnel size: 56.891 Max vertical oil clearance: 0.068 Max wall at crown: 1.46 Min shaft size: 53.919 Min tunnel size: 56.871 Min vertical oil clearance: 0.012 Technical data (in) Max overall length: 0.725982807 Max shaft size: 2.12357845 Max tunnel size: 2.239798691 Max vertical oil clearance: 0.00267716 Max wall at crown: 0.057480201 Min shaft size: 2.12279105 Min tunnel size: 2.239011291 Min vertical oil clearance: 0.00047244 Engine code 221ci V8 / 255ci V8 / 260ci V8 / 289ci V8 / Windsor / 5.0 - H