Article: BN Pipes cat back system diameter: 76mm Tip: TUEV: With EC approval (free registration) Part no.: AUS4B5-HA Car: Audi Type: S4 B5 Modell: S4 2.7 Bi-Turbo B5 Remark: BN-Pipes exhaust systems & downpipes for Audi S4 B5 in our onlineshop - dealer prices on request