I own a 2003 g35 currently I am running denso iridium plugs (12.00 each). I had them for about 3 weeks and only put 100 miles on them. I bought a vortech supercharger last week I was wondering if I should change plugs (colder or hotter) heat range. If so do you have a part number.

 

Yes, you should change to a colder plug to prevent detonation. NGK LFR6A-11 is a good plug to use that is colder than the stocker. Do a search on IE and you'll find them, you can find them for cheaper than 12 ea.

 

thanks i bought a set for 27.00 bucks