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Joe Brodman's 94 Formula (and other stuff) | home
 NGK TR6 Spark Plugs
You can't use platinum plugs (like the factory plugs) with N2O, so they had to go. And since they were really worn out at 55k miles, they needed changed anyway. For reference, those stock plugs really sucked. They had a .070 gap when I yanked them; they were only supposed to have a .050 gap. The MSD ignition is the only thing that probably kept them going.
I went with the NGK TR6 plug. It is two heat ranges colder than stock. Lots of guys running juice use this plug. It is a copper plug, which is better than platinum in performance applications, plus you can use it with the juice, which is important. I have them gapped at .040, and they work great.
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