MillTek Audi RS4 Sport Cat (2019-2021) Tunes & Software Eliminates faulty O-ring assemblies that

Eliminates faulty O-ring assemblies that are 1940s/ 50s technology

retaining the full functionality of the factory diffuser

Stainless steel cast X-Pipe with knife edged design

Includes German-imported 200-cell HJS HD EURO 6 certified Sport Catalytic Converters for maximum performance

Laminar flows and volumetric efficiencies have been further enhanced with our unique and innovative internal merge collector area

MillTek Audi RS4 Sport Cat (2019-2021) Tunes & Software Eliminates faulty O-ring assemblies thatOur range of Cast Downpipes offer further enhancements to gas flow and heat management, specifically designed to increase efficiency and performance gains. The HJS High Flow Sport Catalyst is the highest quality and best performing aftermarket Catalyst. The quality of the product is made to reduce the density of OEM Catalysts and be able to maintain emission regulations with daily usage. Standard OEM Catalysts are usually 500 600 cells, our high flow