i just bought my car a week ago, 4th day i've driven it, and it's been misfiring on hard boost around 5-6k.. (34 gtt)
i've taken out the coilpacks and put silicone over them (basically smothered it all over) found basically scratches and a little notch.. but no cracks of any sort, so i'm just claiming warranty for new splitfires, and also ordered NGK iridium sparks
just reading on here there seems to be quite a few other things that can cause the misfire, but i can't exactly pinpoint where it was just imported in december as well (65,000km on the clock)
let's hope either spark plugs fix it! or new coilpacks do!