My stock coils seem to be reaching the last of there life. Yes I am aware that they are just suposed to go bad. How ever, working with electronics I have learned one thing! Nothing is ever how it seems and all electronic devises can develope a mind of its own. Every couple of weeks I get a missfire after driving for an hour or so. through trial an error I have found that if I pull each plug wire, wipe, hit with rubber malet and repeate. The fowled condition returns to normal. I have changed out the plugs and wires several times over the years and the problem still hangs on So I figured I would get a good set of wires, screemon demon coils and the ACF-12C(???) spark plugs. My question is, How much over stock will this improve my performance? Thanks for your glorious knowledge ahead of time.