Demand the Best. Demand Capristo. Capristo Exhaust Systems are engineered and manufactured exclusively at our factory in Sundern, Germany, utilizing advanced 3D laser-scanning, CAD design, digital prototyping, and CNC-bending/milling. Technical Highlights: 100% Made in Sundern, Germany Highest Grade T309 (1.4828) Stainless Steel; similar resonance properties to Inconel, notably used in F1 Proprietary Valves Manufactured by Capristo Patented Reinforced Design to Eliminate Resonance Manually TIG Welded by Capristo Craftsmen Hand Polished to a Mirror Finish Post-Weld Proprietary Capristo Valves with OEM Actuator Interface Fits Audi TT RS 8S (2016-2023) CES3 / EVCU1 Installation/User Manual For Off-Road and Track Use Only