What are better between the NGK iridiums and the Denso iridiums for a 95 max?? And what other electrical upgrades would you guys suggest getting?

 

The Maxima was designed around the NGK plugs with the specific resistances and whatnot in mind; only use NGK plugs in the Max. You could make a ground kit but I'd suggest cleaning the contacts more than anything to allow for good interface (for lack of a better word)

~THT

 

dont waste yoru money, just buy the coppers and change mor frequently, do what THT said, clean the contacts for the gorunds, if you see that the grounds are very badly corroded, then take 8 gauge wire from radio shack and make your own grounds to the negative battery terminal