New 12 v owner. Truck bought in SE U. S.; want to register in CA, where I am a resident. Truck has no cat at present; intend to have one installed in SE for lower labor and parts cost. Truck has Bully Dog turbo (64-65 mm) and what is said to be slightly uprated injectors. Any one have experience on what I will need to do before the registration exam? Have heard stories all the way from horrible to not-too-bad. Anyone been through this process recently? Any help appreciated.