I have developed a new noise uuder my hood. It can best be described as a squeak/squeal that is realted to how much I have my foot down on the gas. It almost sounds like a niosy belt, but thats not it. I know I have an exhaust leak from one of my headers, could this me what is causing the niose, any other ideas? I know its impossible to diagnose noises without actually hearing them, but give me some suggestions anyway.