There was no exhaust leaks since me and a buddy did my exhaust on the lift at the shop this saturday, But when you listened to the the crank pulley, it had a sound like it was rocking,and then once you move towards the RHead you would hear the noise more clearly at the top. It doesnt sound like piston slap, or a spun rod.I just dont want to be throwing away money to fix something that its not without knowing first. I might just pick up a set of U/D pullies and see if the noise is still there.