Description
5150 AutoSport Head Gasket & Head Stud Kit, BMW S38 11 21 7 838 319 Oil Return Block Fitting 10AN Bore Size Thickness:87.5 mm 0.089" RAD 20 0519 B48 Cylinder Head Valve lock keepers Oil Return Block Fitting 10AN [use factory bolt and O ring]21 8 stud bolts with a tensile strength of 1850 N mm² provide a solution to this