I just bought some top end cleaner and was wondering what the best way to remove the upper intercooler was. Also, have any of you used top end cleaner? If so, did you notice any difference in the way you truck ran? Also, After I get done, do I have to change the plugs and oil? The reason I ask is because I just got done with an oil change and a tune-up. I would really not do either one again right now; especially change the plugs.