corrado917
Go Kart Champion
DIY:Self-explanatory, for anyone with "factory" smoked tips.
I use it for my Magnaflow exhaust tips and I like it. But you have to clean them regularly. Outer part is not a problem. Did you clean the inner part with never dull? If you do not clean the tips at least once every 1-2 weeks the carbon deposit build up very quickly and it'is very difficult (probably it's not even possible) to get rid of it with never dull.