what plugs would you suggest for FI s2000 running a gt3076r and shooting for 550whp? I'm running the okada coils

 

okada projects direct plasma coil is best for FI. Best investment, but for NA, you will not be getting the most out of it. Look at Washabi link and you will find out. For spark plugs, you need to use colder heat range spark plugs. Consult tunner shops. Pulse star plugs are not recommended for your set up.
I will be getting okada projects direct plasma coils for my 2005 s2000 & crv-ex sometimes in September after I come back from vacation in the end of August and payoff the credit card bills

 

I could think of a lot of other ways to spend the money and get better results, but good luck with the buy.

P.S: There was review and dyno with NA on Okada coils, it didn't show any improvement (I don't count 1-2hp improvement)

Pulsar plugs seem to be hit or miss, several people have tried them and dyno'd them. Only a couple of people saw a difference, some people saw a decrease.

Also, the plugs came in incorrectly gapped, some were defective etc etc.

 

Do we have reason to believe the factory coils do not put out enough spark? A 5hp power difference is dyno variance, I have seen my cars vary 7-8hp with nothing changed and only 10 min apart.