I had a 100 shot of NX on my old Cavalier. My second nitrous setup. Use copper plugs that are 2 heat ranges colder than stock. I recommend NGK's. Iridium and Platinum plugs both tend to melt in nitrous apps. I can't believe nobody has mentioned timing yet. If you are running more than a 50 shot you have to retard the timing a few degrees if you don't want detonation. That's my $0.02