im running agpr 902p motor craft plugs i realise i should have gone for a better plug heinsite an all that but going to run these first saying that i now someone runs them with a saff 380bhp with no issues im on stg 1 2wd saff. i no with a std coil the gaps have to be closed up but now ive fitted the grp a coil what is the best gap ive allready noticed after starting it tonight it idles allot smoother thanks ray