Can you remove the front catalytic converter on a 2002 Nissan Xterra and replace with a straight pipe?

Yes, you can remove the front catalytic converter on a 2002 Nissan Xterra and replace it with a straight pipe. However, doing so is illegal in many areas due to emissions regulations, and it can lead to failing emissions tests. Additionally, removing the catalytic converter may affect the vehicle's performance and trigger check engine lights. It's advisable to consult local laws and consider the potential consequences before proceeding.