I am installing a 10" 8 pound pulley, and wanted to know what plugs to use. I have a set of Denzo 22 and 24.

 

I have a 6# pulley and will use the Denzo 20's. I also have an 8# pulley and have been told to use the Denzo IT 22's. Who are you using for a chip??? The tuner you choose will give you a good idea of what plug to use. Most of the modded Lightning I have seen, use the Denzo IT 22's. Good Luck and please look at the post from Ken800 again. I have ask a few questions on your exhaust.....

 

NGK TR5 or Denzo Iridiums (Best on market)