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: 8B1578H Bearing size: STD Bearing half type: Identical halves Bearing material: F781 Technical data (mm) Max overall length: 15 Max shaft size: 53.99 Max tunnel size: 57.616 Max vertical oil clearance: 0.103 Max wall at crown: 1.794 Min shaft size: 53.971 Min tunnel size: 57.6 Min vertical oil clearance: 0.055 Technical data (in) Max overall length: 0.5906 Max shaft size: 2.1256 Max tunnel size: 2.2683 Max vertical oil clearance: 0.0041 Max wall at crown: 0.0706 Min shaft size: 2.1248 Min tunnel size: 2.2677 Min vertical oil clearance: 0.0022 Engine code N63B44 / S63B44 Application BMW N63B44 4395cc V8 DOHC 4v Twin Turbo 03.2011 -  BMW S63B44 4395cc