StopTech stainless steel brake lines are a great upgrade for your Subaru BRZ/Scion FR-S. The stock rubber brake lines will flex, slowing down response, and hurt your performance. StopTech stainless steel brake lines do not flex, and will provide a quicker, and more firm pedal response. StopTech uses a Teflon inner line that resists pressure, and will not degrade due to exposure to brake fluid. StopTech stainless steel lines for the BRZ/FR-S also feature a clear abrasion resistant cover for protection against chaffing.