Hi,Im just about to service my car and prob gona replace the spark plugs with the denso iridium ones (as these seem be recommended by quite few people)Just wondered if its worth replacing the HT leads or coilpack. Not sure if these need replacing at certain times or not. Or is it worth doin now mods have bin done to the car (cams, TB etc).My car will be 9yrs old in oct and dont think leads or coilpack have bin replaced. Car has only dun just over 49k miles.Wot does everyone think?Matt