You'd best make yourself aware of your state and federal emissions and environmental laws reguarding removing, disabling , bypassing emissions devices on your car.
You are also subject to other state and provincial (Canada) environmental-MTO/DOT laws and road side enforcement, when traveling there.
A lack of a cat(s) will get you a fine for sure and invites further looking under the hood.
There is no valid reason to eliminate the cat(s). Magnaflow/Carsound have cool hi flow hi performance cats that will support well over 400hp.