I’ve read through a lot of the forums for exhausts for sc 400. I just picked it up this last week, straight open headers no exhaust. It’s throwing CEL from no o2 sensors and no exhaust, what’s the best route to get a full exhaust system with o2 sensors? I haven’t seen any good systems linked, is my best bet taking it to a shop? Also Ik there was 3 cats on the stock exhaust, only 2 o2 sensors needed to be connected correct?