i HAVE A WIERD KNOCKING NOISE IN THE REAR RIGHT PART OF MY CAR, AS OF RIGHT NOW I THINK ITS MY EXHAUST HITTING SOMETHING WHILE IM MAKING A LEFT TURN. IT ONLY DOES IT WHEN MAKING LEFT TURNS TOO. IM GOING TO STIFFIN UP THE EXHAUST THIS WEEK BUT I JUST WANTED TO KNOW IF ANYONE ELSE HAD THIS PROBLEM...