Hey Huudoo, glad you are going to make the tail of the dragon run...I purchased my X-Fire used as well and there was a black soot build up on the chrome exhaust tips. I sprayed them with a mild wheel cleaner and brushed the seams with an old tooth brush...my dealer asked the other day if I drive it or not because they are so clean and bright, LOL! Just be sure to rinse the heck out of them if you use this method as the acid in the cleaner will discolor or corrode the chrome if you leave any on it.

Good luck and see you at the Dragon!
Terry