2008 Mustang v6 Auto is making a clicking noise From the middle of the engine ?
It's sound like a lifter is acting up when the engine is cold. To fix it right, you need to have the lifter changed out. Some times a good oil change will help this problem. But thing to remember is, if it's a 2008, I would take it to a Ford dealer for warranty work to be done on it. If you add anything to the engine, Ford can drop the warranty.