i still have my oem spark plugs in my car. i have a gt30r w/ perrin fmic and deatch works inject. do i need to go back with a oem plug or a colder or hotter one? im not sure. i want to change them out tomarrow. ill be going to o'reilly's or auto zone. what should i ask for? any suggestions would be appreciated. thanks
From what I've read its worth it to go one step colder with those mods. Might depend on the tune. I'm no expert though so maybe someone with a little more experience will chip in Edit: Tray chimed in as I was typing, and yeah they're hard to find at parts stores. I ended up ordering mine from summit but top speed would probably be easier.