Street Coilover Kit (Inox) for Audi A6 C6 (4F)Street Coilover Kit (Inox) for Audi A6 C6 (4F). The Street series suspension is the default configuration of MTS Technik engineers, it guarantees a wide range of lowering and a balance between comfort and stiffness. Suitable for the following engine(s) only: 2. 0 TDI 2. 0 TFSI 2. 4 2. 4 quattro 2. 7 TDI 2. 7 TDI quattro 2. 8 FSI 2. 8 FSI quattro 2. 8 V6 3. 0 3. 0 TDI quattro 3. 0 TFSI quattro 3. 0 quattro 3. 2 FSI 3. 2 FSI quattro 4. 2 FSI quattro 4.