Ye last week i took my car to the muffler shop and got a 3" piping put in , i took out all silencers , catback converter , every thing and replaced the catback converter with a 3 " straight piece . So it is a 3" straight piece right from where the catback converter was in and at the end i put on a turbo race muffler. this modification cause the turbos's to get up to full boost quicker and cause me so feel the gear changes more , it also made the car faster than before and gave it more torque. I will take some pictures of it this weekend and post them