yeah we were told that the 300zx would fit put it on and no luck bu i put the different plugs on to suit and it wouldnt start. so i managed to find one of a red top rb20 which had a different plug pattern to the standard cefiro rb20 plugs but it matched the z32 plugs which i had just put on the car the car run for ten mintues with a back fire and the end of each fourstroke cylinder cycle (strange i know ) then put my hand on ingniter and its was F******* hot and then car shut down any possible sugesstions to what caused this obviously this ingniter pack is cooked now but why do i keep frying them please and thank yous