thanks for getting back chums you lot are my new family cant seem to get 071c so got the 902p would i be right in saying they were the standered plug fitted on the production line by motorcraft some one i now runs them with a 360 saff on a standered coil with no isues if get any probs im guna go with the ik these are by denso i asume wish i got them fist what sort of gap 0.6/0.7 ive heard with stg1 im haveing probs with the plugs blowing out at 4500rpm i thought it was the rev limiter untill i started to look at the rev counter instead of what hedge i was heading for im hopeing the group A coil and decent plugs will sort this