I dont know if playing with this is a good idea. If you add any more to your exhaust system, you are going to add more back pressure. The more back pressure the more heat, and that means a very good chance of burning it down when you least expect it. The only way I would even consider this was if I had a good set of pyrometers and watched them at all throttle positions. My advise would be sell those pipes and look for another set.