Originally Posted by wickedgreyzx3
mods please clean up thread, this thread is about OE and copper spark plugs, not rediculously expesnive designer spark plugs that there is little to no evidence or testing done on them and only claims by the manufacture.
Sorry about that man. As I stated earlier, only 3 plugs have ever been tested side by side (remember weapon x? lol, the 25$ apiece 1hp gain plug).
stock, 103's and wx, no others.
actually running 103s in the 07, idles a tad rough but otherwise everything seems good. rough idle may be a combo of the steeda sri and plugs, have to do a little looking into on plug gap and see if that fixes it.