Im pretty sure my plugs are getting a little old. I'll be dynoing this month some time so Im getting new plugs and a fresh oil change and all that good stuff. Which plugs should I go with for a sohc zc vtec (z6) at 10lbs? I've read that zfr6j-11 is fine but then I've read that BKR7E-11's are good too...but I've always been under the impression that the BKR7E-11's were for B series. Is that true or are they a good plug to use with a z6? And if I went 2 step colder, would it hurt performace any since I should only be making around 200-215whp? Or should I just stick with 1 step colder? Just need some goooood plugs that aren't going to end up running hot on me and that will give good spark as well.