Does anyone know what I'm going to need to pass ****ty new york emissions on my 2004 WRX it currently has an HKS catless up and down pipe. I bought the car from texas. Just need to know what the best catted downpipe is or if i should just have a cat welded to the downpipe? It currently is running a Forced Performance ported 16g turbo at 18psi. Need something that isn't going to cause turbo creep.