I have a 2004 Mustang 4.6 SOHC. I recently had to put a new motor in it. While I was putting it in I put on trick flow valve springs and Doherty racing cams. Also has pypes long tube headers on it. I got it all put back together and now it has a slight tick sound like an exhaust leak. I have taken both headers back off and cleaned them up and put new gaskets on them, Replaced the passenger lash adjusters as the noise is more prominent on the passenger side and I thought that might be the culprit but no luck. Also took the timing cover back off and noticed one tensioner wasn't pumping up correctly so replaced that too. Still no luck. Car still runs good it just has this annoying tick. It isn't a rod bearing either. I have heard those go and this isn't that. Any help on this would be greatly appreciated.