I have a 2004 5 speed Mustang GT. Heard a screeching sound (like a bad fan belt x 10) while driving & called AAA. I was told it was my radiator fan & that I had a small leak. The clutch felt different at the same time. Took it to the dealer & was told I had a radiator leak & also needed a new clutch. Should have had it towed somewhere else but let them fix it. As soon as I picked it up, I immediately noticed it sounded like an automatic V-6. Took it back but they said that the exhaust hadn't been changed & that it was fine. No, it's not... took it to another dealer who said the same thing- all was ok. Took it to a muffler shop. They checked the catalytic converter, checked the install, said it was a Mustang exhaust, said the dealer hadn't touched the muffler and said they couldn't find what could have caused the change in the sound. I'm dyin' here. I shouldn't need to purchase Flowmaster or some other exhaust when my car was extremely loud with its stock exhaust. Any ideas?