I went with ngk 94201 gapped @ .022. Runs well with them.What is the consensus re: best plugs to use for B58 coils on N54 using this set up?
My car is currently stock but will do a "stage 2" tune up to 16-18 psi, targeting 350-400whp. Eventually want to aim for high 500s with upgraded hybrids when the time comes to replace stockers.
Any thoughts re: plugs?