Well im N/A for now till the end of the year. Drive a 03 6mt, planing on going the whole 9yards and get the apsTT kit. I see how the tall boy is just the upper plenum, is it as good as going with a full plenum. I would think if there would be enough of a differnce APS would of come out with a full plenum instead of just going with the top. Does anyone have experience with both of these, would I notice any differnce while N/A? Planing on purchasing very soon, trying to get all the stuff that I can use with the TT now. Such as pulleys, plenum, grounding kit any other suggestions?