There are 2 apex's around here setup identical other than the skid, one has a t-sled skid with a 162x16 CE and the other has a newer revalved AC skid with the 162x15 PC. on the same boost (14lbs) the the one with the AC skid and PC is gaining speed when the other is slowing down and trenching out. Unbelievable difference. I have also seen the same AC skid setup under nytro's and work a lot better than stock, but if I was going to do it I would go KMOD with a PC, (it works the best out here) or maybe a 15 wide CE.