The Invidia Gemini exhaust system is constructed with high quality SUS304 stainless steel and manufactured with a fully polished finish. All Invidia Gemini catback exhausts feature mandrel-bent piping for maximum exhaust flow and reduced back pressure. Each Invidia Gemini catback exhaust is superbly crafted using robot-TIG welding for a uniform weld. All flanges on each Invidia Gemini catback exhaust are CNC-machined for precision.