Ruflyf, I am currently running One step cooler plug the Denso Iridium IK20.

The shop is recommending I go with a standard NGK with a step colder. Going to try that and see how it goes. That is what they run on their turbo and SC motors.

Gary, I hope they are good tuners, they seem like a nice bunch of guys... can you point me to where there is some chatter about them on your subie site, I would like to see what is up.