exhaust valve

Hello i have a question regarding the rubber pipe that is on the rear of the s3 8p i believe it is for the stock system being valved i am stage 2+ and i run a bcs wrc decat full system would it be wise to use that rubber pipe already at the back of the car for the valve of my exhaust or...

So I followed the method of putting the car in Sport/Dynamic and then turning the car off. I unplugged the exhaust valves and then went for a drive. I feel like there is absolutely no difference in sound at all.. to the point where I think I may have even closed the valves rather than...

So I'm returning my Audi S3 (14 plate) to stock so it can go into Audi to have various updates before warranty expires. Took it to a local mechanic to have the induction kit put back to stock, and thought I'd also get the AWE Tuning Switchpath Receiver I have installed removed from the exhaust...