StopTech Drilled Sport Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers that look great behind your wheels – and offer significantly improved braking performance. The unique cross-drilling aids with heat and brake dust dispersal; prevents glazing of the pads; adds bite and improves wet and dry braking performance. Built to last; the black e-coating provides protection from corrosion and the high carbon metallurgy (in most applications) offers quieter operation; better crack resistance and increased performance. Premium e-coated rotor with advanced metallurgy that greatly reduces pad squeal. Especially effective with higher friction, European style brake pad compounds. Drilled for increased bite, improved looks and better performance Premium e-coated rotor with advanced metallurgy that greatly reduces pad squeal; Especially effective with higher friction; European style brake pad compounds; Added Molybdenum and Chromium to resist rotor cracking 1990 - 1991 BMW 325iX, 1990 - 1995 BMW 325i, 1990 - 1995 BMW 325is, 1991 - 1998 BMW 318i, 1991 - 1998 BMW 318is, 1996 - 1999 BMW 328i, 1996 - 1999 BMW 328is, 1996 - 2002 BMW Z3, 1998 - 1999 BMW 318ti, 1998 - 1999 BMW 323is, 1998 - 2000 BMW 323i, 2000 - 2000 BMW 323Ci, 2003 - 2006 BMW Z4