It did a quick reading of the answers before me and I see alot of wrong answers. If your going to turbo your car in the future you MUST get 3 INCH diameter piping.There are plenty of great exhaust. I personally favor Apexi N1 WS exhaust.bigwhp_h22a4 and I are on the same page with this. Take our advice.Its better to ask questions like this at websites dedicated to this topic. www.honda-tech.comAlso visit wwwyoutube.com and search turbo exhaust for sound and video clips of different pipes