CNC milled stainless steel flange for the construction of a downpipe Downpipe Flange Audi B5 RS4 2.7TT and C5 RS6 4.2TT Flange for fabrication of the downpipe Premium stainless steel downpipe flange This flange is used to fit the downpipe to the turbocharger, at the turbine outlet. All turbo related flanges are CNC milled and guarantee a perfect smooth surface and 100% accurate measurements. Additionally we supply stainless elbows and collectors needed for the fabrication of an exhaust turbo manifold, exhaust systems and more. Audi RS6 turbocharger or even a Hybrid RS4-RS6-K06 turbocharger fitted to an S4? This is the right flange to build your downpipe. Please keep in mind that two flanges are needed. Material: Stainless steel 1.4301 / SS304 Material thickness: 10mm Thread: für M10 Extras / Features: Double holes, for fitment on RS4 (B5) K04-25 / K04-26 and RS6 (C5) K04-28/K04-29. Alle holes without thread, they have an ID of 11mm. For / Fits: Turbocharger for RS4 left and right Turbocharger for RS6 left and right Audi RS4-RS6-K06 Hybrid (upgrade) turbocharger RS4-K06 Hybrid (upgrade) turbocharger