[MaSnaka]

Check your exhaust flage at the header to collector. I have had a leak that was heating up the fiberglass in the engine bay right next to the flange. You should be able to feel the exhaust leak with the car at idle but don't burn your hand. Or check for carbon deposits in the area...I guess with a white glove while things are cool, next check the flange bolts because they can become loose. Good luck!

John