I have a 97 honda civic dx 2dr and i been looking fo some headers for my car because my stock one has a crack in it. Now from my understanding the stock headers has the cat right on it. so my question is will these headers fit my car and will i need to do anything with the o2 sensor that goes on the cat. Like will i have to buy another cat if i use these headers or somethin??? thank you guys in advance. http://www.upscaleautomotive.com/p-16679-megan-racing-stainless-steel-header-for-88-00-honda-civic-exlxdx-d16.aspx