Below is information direct from Germany regarding this product.
It may show additional information about fitment and specification.
Downpipe for Audi TTRS 8J / RS3 8P without Catalyst Converter
? Diameter of 90mm to 2x 70mm
? Weight 4,6Kg
? High-quality stainless steel 1.4301 (SS304)
? CAD-Designed and optimised
? 1 Oxygen Sensor Connection
? 100% oem fit, easy to replace factory part
? No Precat so less thermal load for the turbocharger
? Better performance by reducing back pressure
? Significantly higher torque
? Suitable for Audi TTRS 8J and 8P Audi RS3
May not be approved for road use in your region.