Porsche|Cayenne Turbo 4.0T / Cayenne Turbo Coupe 4.0T (E3) Gr.1 titanium / T304 stainless steel exhaust systems and tips for the full R8, RS, and S portfolio. All of our Porsche|Cayenne Turbo 4.0T / Cayenne Turbo Coupe 4.0T (E3) components are 100% made in house at our factory and we are aiming to provide our customers the best sounding aftermarket exhaust system.