I have a 98' Honda civic Dx 4door and my exhaust manifold is cracked. I bought a set of headers to replace the cracked manifold but if I take the manifold off the converter goes with it. So my question is if I put the headers on, can i place a converter under my car and everything work right the it should? You know, like the engine light going off and being able to pass tennessee admissions. Thank you.