Hey guys,
Long time no see

I have a favor and my Civic knowledge is a little limited nowadays. I have a GF that has a 2000 Honda Civic DX (I believe because no power windows, etc) and the dealer is telling her that her primary cat is bad and wanna charge her like $700.00 to replace it.
From what I can, from looking its part of the header right? or can you buy just the cat?
Can you guy point me to a place where I can get a good deal on this part?