Ok so I have a ford ranger with a p0420 code and would the catalyst make it sluggish or would it be more of a 02 sensor that would make it sluggish and should If it is a catalyst should I just replace it with pipe since it would be cheaper than buying a cat or should I buy a catalyst or do I just need to buy the 02 sensors because it is being extremely sluggish but on top of that I have p0305 codes and the misfire first 1000 revolutions codes wondering if it could be bad heads also it vibrates like crazy on the interstate