I think i really wanna go with Specialty Z Sebring Exhaust system. I talked to the owner and stated its the best flowing sysytem for a TT with x-pipes and you can expect to gain 30 HP from it. He said the sound is also on the louder side and that aluminized piping would be fine. I think i might do the piping coming directly off the muffler stainless steel just to give it that shiny touch when you see the piping from the back. Gonna save my money for one of those systems i believe, right now im gonna buy that JWT Pop Charger from them for 100$