Hey hows it going! New to the site and a recently done some mods to my 2000 GTP. So far I have put on the smaller belt, a 3.6 mps, 1.9 rockers, CAI, zzp 1.0 pcm, speed daddy headers, 105 valve springs and mod retainers. Nothing crazy at this point. My question is, and forgive me if this is a "noob" question, when I get after the car a bit and run it WOT. It will get up quick but seems like once it hits a certian rmp range maybe 5k? it seems to stall, lag a bit, then jumps right back into the power and continues like nothing has happened. My question is possibly is this because of my tune? Air/Fuel? maybe tranny? Im not exactly the most car savy person when it comes to trouble shooting. My only guess was what I had mentioned earlier. Any help would be great. I have heard (after I bought it, of course) zzp's 1.0 tune sucks. I was just curious if that was it or possibly something else. Like to thank anyone who responds. Just kind of starting this gtp mods and needing some advice! Thanks for the help