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: 4B1489H Bearing size: .25 Bearing half type: Identical halves Bearing material: F781 Technical data (mm) Max overall length: 16 Max shaft size: 44.991 Max tunnel size: 48.016 Max vertical oil clearance: 0.071 Max wall at crown: 1.493 Min shaft size: 44.975 Min tunnel size: 48 Min vertical oil clearance: 0.023 Technical data (in) Max overall length: 0.6299 Max shaft size: 1.7713 Max tunnel size: 1.8904 Max vertical oil clearance: 0.0028 Max wall at crown: 0.0588 Min shaft size: 1.7707 Min tunnel size: 1.8898 Min vertical oil clearance: 0.0009 Engine code S14/7 Application BMW S14/7 1990cc Inline4 DOHC 4v