Have oxygen sensor locations changed over the generations for Integras? I have a 2000 GSR swap and both my sensors are on the cat. But I read somewhere that for 2000-2001, one of the sensors are on the header...is this true? If not, why are DC Sports headers different for these years.

On the subject of headers, is there any difference between a two-piece 4-2-1 header and a one-piece besides ease of installation?

Ultimately I'd like to know what year header to order for my swap (one without an O2 sensor on it). Thanks!