-you don't need to change your fuel injectors when you change your spark plugs.
-just get the factory plugs but not from nissan. they are BOSCH heat range 8. they are just as effective if not better then the HKS and cheaper. It is also the colder plug out for this car so please don't ask for a colder spark plug, just advise.
-you should not have to change your plugs every 3k miles, thats more for your oil but it wont hurt.
-plugs should come pre-gapped for car specific
I hope I helped
V/r
Joe
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