Hello, I'm looking for some recommendations for an exhaust system on my 2.4t. I've completed a stage 0 on the car 116k miles on the clock.

I'm thinking of a CNT cated down pipe(my state requires a CAT.) 3 in mandrel bend piping...then I'm torn between straight pipe or an aggressive muffler(borla xr-1 or something of that nature).
So to some it up, has anyone had good experiences with the CNT downpipe..and is staight pipe a good idea? Thanks!