What's the biggest I can go on my throttle body, 72mm?? There's a performance shop in town that bores TB's for $100 even, and yes they're well done. Besides that I have one more question, with the CAI, tb, header, and exhaust, what should I use to tune the A/F ratio. FPR, V-AFC, or Chipped ECU(hondata, etc.) BTW, I also plan on installing cam gears. I have already searched and not really found the answers I'm looking for, soooo....also I figured there might be some new tuning products out there, well, thanks in advance. Peace Out