Ok, so back in the day it was popular to gut your main cat so I did. Now I understand what is happening to the exhaust and how that open area is bad. Now I understand that the pre-cats are the best mod and I want to do that. I have read posts about how bad the exhaust is with gutted pre-cats and a gutted main cat. Other than spending the $500 on a new main cat what other option would I have?
