I have had my 2000 Golf 2.0, 5spd for about two weeks and I love it. I drive it on a daily basis and recently I started hearing a rattling noise coming from the cat only at lower rpm. Yesterday I confirmed that by lifting the car and the noise is coming from the cat. <p>There is no cel, but when I did the obd scan there is a pending code p0304, misfire, which can be related to bad cat as well. <p>Wanted to know if anyone has experienced the same? The car drives fine its just annoying to hear the rattling. What would be the best thing to do, go oem new cat or a aftermarket one? Don't want it to trigger a cel. <p>Thanks!