42 DD Down Pipe concerns. Help?
 

I have a 2001 Audi TT and looking to upgrade my down pipe. I'm really interested in the 42 Draft Design one but kinda worried about it at the same time. It says that once that the down pipe is installed, I will get a CEL and I don't want one haha. Is there a way that I can install this down pipe in a way that it doesn't affect the engine light?

I kinda want the street design 42 draft design down pipe. Does this set up come with a catalytic converter? What about future modifications to the cat back exhaust? Will I be able to attach a cat back exhaust to this down pipe?

Thanks in advance guys! :)