the oem plug for b16's now is the platinum ngk. i had the hardest time finding the right plugs for the b16. ihad to order them online. kragen didnt carry them at all

:edit:
im pretty sure the stock ngk# is BKR6E-N-11 for ngk coppers
i bought mine from http://www.monarchproductsinc.com for $1.99 each. they shipped really fast. dont forget to gap them b4 u put them in (theyre not pregapped.) .044" is the gap i believe