Can you see if there has been any work done to my heads?

Thanks for all the info guys. I do add a little led additive every time I put gas in it. I think I will let them stay on for now and If I need to remove them I will post pics and take it from there. Dont fix what aint broken comes to mind. Also I need to save up some money for other projects. But again, I got good advice and learned a lot. Much appreciated.