I've noticed that an annoying rattle has developed on my 99 with 18.5k on it. I believe its coming from the exhaust but have checked all exhaust connections and they seem solid. For the most part, the rattle is only present during spirited to hard accel or engine braking, doesn't seem to be present during normal cruising. Any ideas and help will be greatly appreciated? I'd like to get this solved before my weekend long ride starting friday.