Contour Enthusiasts Group Archives Forums Modifications Forced Induction nitrous plug confusion

I did some searching for what kind of plugs to get for a zex dry kit that will have no more than a 75hp shot. I found that it should be a copper plug gapped between .035 and .045 and something about NGK plugs but I am not sure which ones.

NGK TR55 are these 1 step colder or stock heat range

NGK TR6 are these the ones I am supposed to use??

which plugs should I get, and can I get these at an autozone?

while searching I also found some posts about colder plugs affecting performance when not on the bottle. How will these plugs affect my performance when just driving without the n2o?

thanks for the help.

The colder plugs foul easier but this isn't really an issue with a properly tuned engine in good condition.

TR55 = stock heat range
TR6 = 1 step colder

1 step colder in Motorcraft is a "22" (AGSF22C)

1 step colder in Autolite is a 103.

Gap them at .045