Remus non-resonated valved cat-back for the Audi RS4 B9 Avant (2017+), built for the 2.9 TFSI DECA engine - no GPF models only. Fully EEC approved, stainless steel throughout, with quad 84mm tips and OEM vacuum valve integration.
Aggressive tone on demand, quiet when you need it
No fabrication or alignment tweaks required - direct bolt-on fit
Shot-blasted finish, lightweight construction, track-day ready but daily drivable
Valves respond to factory controls; no coding or extra modules needed
