Get the red if thats the color you want.. so far I have not heard of any good plugs out yet for the mustang. and 8mm is still a good thickness. You can lower your spark plug gap and that is said to give you a few. in the new issues of 5.0 where they installed the procharger they talked about no new plus in the market yet and that they did reduce the gap (dont have the mag with me) but stated that doing that will add a few..2-3 ish I think.. The wires themselfs are not going to do much so get red for now. There are so many other things to do to get hp .. just get an SC and let other people stress about 3 hp here and 10 hp there.. haha.. or nos it.. but not that much [sm=badbadbad.gif]