Anyone know how this happens... Catalytic converter rattles loudly when the engine is decelerating. there is no TSB on it for the 06... I put the car up on jack stands and pounded on the exhaust with the palm of my hand and I could hear a rattle in the drivers side converter. I don't think I will get this covered under warranty with the super charger on the car.. I wonder if they can replace just one side at a muffler shop..