We got our 392 in May and after every start is squeaks. the squeak goes away after a few seconds depending on the last time it was driven, it squeaks the longest on a cold start. I have taken it into the dealership twice and they are telling me now it is a known issue that is designed to happen. They say it has to do with the performance exhaust letting out pressure at the valve, they said its supposed to do that. I don't believe its supposed to make that noise. Does anyone else have this noise?