This Apec Brake Disc – Front (SDK6005) Fits BMW has been precision-crafted for consistency and is part of the Apec Blue range. Z4 Petrol Convertible 2.2i 2171cc 125KW 170HP M54 B22 (226S1). Z4 Petrol Convertible 2.5i 2494cc 141KW 192HP M54 B25 (256S5).