APR Braided Stainless Steel Direct-Fit Brake Line Upgrades are a direct replacement that improves your braking experience with the best lines on the market today. We do away with the factory rubber hoses that expand and can even rupture over time, and replace them with braided 304 stainless steel lines with a smooth-bore Polytetrafluoroethylene (PTFE) / Teflon core that allow for very little expansion. This gives you a firmer brake pedal with less required pedal travel.