There is also a muffler hanger bracket that needs loosening before removing the rear pipe and muffler assembly. The bracket is at the very rear, just behind the rear fascia. Once you crawl under the car you will see it. One more tip: It is very difficult and dangerous to remove the stock exhaust pipes and muffler by jacking the car up. DO NOT DO IT THIS WAY! The easiest and safest way is to have your car raised on a lift by a competent mechanic that knows how to raise a C5!