whats up i have a ej8 i just swapped my jdm b20 for a us gsr,i got a stock gsr header for it and tried to bolt it up but it didnt fit my cat my car is supposed to have type r exhaust all the way back my boi has type r exhaust and they look identical but anyways, what cat do i need to get that will line up correctly oh yeah im plannig on getting a aftermarket header will i still need the change my cat....