Pettit Racing Trak Pro Clutch Lines are a direct replacement for the stock rubber lines. Improves pedal feel and response. These are the same lines we use on our race car. Installs in about 30 minutes. Pettit Racing Trak Pro Clutch Lines are top of the line DOT approved stainless steel flex lines with DuPont Teflon core. "SIMPLY THE BEST", IN Fluid Transfer Systems.