MBRP 2.5" T304 Stainless Steel Resonator Back Exhaust With Quad Split Rear - Audi S4 Sedan and S5 Coupe 3.0 2018-2022Cruise the highway or hit the track with an MBRP Street Profile exhaust. Its the perfect mix of aggressive sound when youre into the throttle without being obnoxious on long drives. *Fits with Sport Differential* *Excludes Cabriolet* Features: 24% Flow Increase Eliminates Exhaust Valves with Electronic Valve Simulators Easy Bolt on Installation 4" Quad T304 Tips Moderate Tone What's Included: MBRP 2. 5" T304 Stainless Steel Resonator Back Exhaust