Z4M Big Brake Kit Front LinesDescription These brake lines fit both Z4M and Z4 non M cars with the Front Porsche Brembo Big Brake Kit. They will fit many other big brake kits as well. They are a DOT approved, high quality piece. The lines have a rubber grommet installed which locates it to the strut housing and prevents chafing of the line. They are an excellent alternative to the Stoptech BBK rear brake lines. Installation is made easier with the elimination of banjo fitting and