WoW! awsome feedback, but I'm Old school...the electronic stuff is just to much work for me. I rather drill, cut and weld! I'll look at the Mazdatrix header...thnx Jeff. Will it affect the powerband in a bad way if they open up to soon?

Yes IF and only if they open too soon. The guy at Mazdatrix said that sometimes the RB version would open either too late or not at all. Give Mazdatrix a call for more info