Sorry it’s been so long to get the XS Power report finalized. I live on the east southern states and the last month and a half has been terrible with either ice, snow or freezing weather I have not been able to get the dyno done. Well finally got it done. As I stated in the second portion “Installation” that downpipe went on great without an issue, and the car sound great. I did feel the power gain right off. The CEL light came on but for only a few days. As stated in the first portion the WHP was 152.8. After the downpipe modification the car dynoed out at 165.5 WHP that is a gain of 12.7 horses. I would definitely recommend this down pipe to any other Audi Owner.