slocivic99

I want to replace my exhaust manifold/cat. How can I do this to were my check engine light will not come on? If I weld in one of the o2s bung extenders for the 2nd o2s with that be enough? All the manifolds come with a bung already welded for the 1st o2s.

Car has stock engine

If you have any comments asking "why would you do this" just leave them to yourself and if you dont really know how to do it but you post anyway please dont bother......

Thanks in advance for anyone with information that will help.