My pacesetter headers will arrive on Monday hopefully, and their for an 04 gtp as well. It doesn't have the ZZP Kit, but i did buy a better gasket for the downpipe, and will be picking up band clamps to seal up the leaky y pipe. I hear the EGR also is the wrong size on these, but i am going to try and make it fit and use rtv to seal it up. I will let you know how the install goes, but i will likely have to wait until i get a weekend with 3+ days off because if i do something wrong(Quite likely to happen lol) i will not have a car, and i have to drive to school, but hopefully ill put them in next weekend!