Ever start the car first thing in the morning (or when the block is cold) and when you start to drive off the car spudders a bit and only when the car warms up a bit does it run smooth from a dead stop? well, it's your buttplug..i mean sparkplug.
these should be changed with inspection I and II but hell, who's counting?
My source for the OE replacement at the cheapest price is at:
www.sparkplugs.com
part #:
BKR6EQUP
discount code:
nicoclub thanks to, well, you guessed it, NICO club (for those that don't know it's Nissan/Infiniti forum)
this is for NGK plugs BTW.
i orded 8 for the 540 and total FINAL price (included shipping) was $67.01
some other sites are going to cost about the same but they all do the same. the other sites might be forum sponsors so do buy it from them if you can/want to spring the extra dough. i bought mine before finding all this out or i would have supported the sponsors for a few bucks more. i'm cheap but when it comes those who make this place possible, i'm all for it.