I have tried two types of coil packs, firstly superspark, now with these, i will just go ahead and say they are rubbish, because i bought a set and they failed after a couple of months, then i took it for warranty and they sent a few spare ones, they worked for a while and started missfiring again. i would just stay clear of these ones!, Now the second brand was splitfire, i have had no problem what so ever with these ones, so it prooves the superspark ones are shit quality, you can even see with the mould quality with the two brands. Just pay the extra $200 or whatever and get splitfires, it will save you money and hassle in the long run.....