My 4lb power pack should be here tomorrow. I plan on installing it all this weekend. It will have TR6s with it. I looked at the spark plug chart that was posted here a while back. When the KB gets here, it will have a 3.5" upper, so from what I have been told, with the 4 lb lower I should see 13-13.5 lbs of boost. The spark plug chart says I should use NGK BR7EF gapped at .038-.036. What do you guys think? I see on the chart that 12 lbs is the top end for the TR6s.....The 13 lbs with the KB is not considering any boost gains I may see from my CAI. I already spoke with Mark, he is going to email me a canned tune for the KB when I get ready to put it on, just so I can drive it to/from work and on the 4 hour trip to the dyno