Pettit Racing Trak Pro Brake Lines for your RX-8 are a direct replacement for the stock RX8 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 RX-8 Trak Pro Brake Lines are premium DOT approved stainless steel flex lines with DuPont Teflon core.