Consider purchasing Goodridge SS brake lines for your 05-07 A4, 02-04 A4 Quattro, and 02-11 S4. Goodridge is a well-respected brand among Audi enthusiasts and these brake lines offer several benefits. They improve braking performance and eliminate sponginess, as well as being resistant to abrasion and corrosion. Additionally, they meet FMVSS106 standards, making them compliant with the Federal Motor Vehicle Safety Standard, and are TUV approved, a standard followed by many international regulations.