Right now I'm using NGK BKR7RE plugs in my ZC on nitrous. I just found out that they are projected tip plug which, my understanding is bad for nitrous use. Anybody have any recomendations or part numbers for NGK plugs that I should be using? Or should I just keep using the plugs Im using now. I havent noticed any problems with them, broken electrodes, or any other signs of problems or detonation.

Thanks
Gary