StopTech Stainless Steel Brake Lines provide a quicker, firmer, and more consistent pedal response by maintaining consistent brake pressure. These high-performance lines utilize a Teflon inner pipe covered with a layer of stainless steel braided weave to prevent hose expansion under pressure. This kit is specifically designed for the rear axle of Audi RS4 models. The kit includes: 2x Rear Stainless Steel Brake Lines (P/N: 950.33508), crush washers, and necessary mounting hardware for a direct bolt-on installation.