Hey, Ive had my XR6 Turbo for a couple months. When I turn it on and the car is idling the engine makes a ticking sound is this normal? When I bought the car it squeals when you brake and the guy said it will do this because the brakes are new, I've noticed that there is black residue on my rims which I think may be from the brakes? My last question, should I get the center muffler removed from my xr6 turbo, when I went to the mechanic he said that it will cause a lot of drone and he said his price is $175 SE in melbourne? If anybody can give me some feedback it would be greatly appreciated. Thank You