Hmm, nope, I don't think I get what you described here. Have you checked the exhaust to make sure it is tightened securely, or are you relying on what the installer told you?Black94VR4 said:jon3k,
Mine is the same. My question is that do u hear "something is loosen underneath ur car" sound when u let off the gas? Sometimes the sound rattles eventhough the exhaust is tighten securely.