I had my Milltek exhaust fitted yesterday, it was given to me when I bought the car so is second hand. Basically it sits VERY high, basically touching the bumper at all times but it definitely rattles against the bumper at times. Will the rubbers 'settle' at all? Or is there anything I can use between the bumper & the exhaust to stop any damage happening or to at least stop the rattle? If i do use something I'd want it to be that I can't see it. Thanks in advance