4200 rpm. [2] Applications: 1992-1995 E36 325i/325is 1992-1996 E34 525i/525ix S50 The S50 is higher performance version of the M50 which was used in the M3 . S50B30 The S50B30 is a 2,990 cc (182 cu in) higher output version of the M50 which powered the E36 M3 (except in North America). It produces