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i am looking for a pair of headers to go with my magnaflow catback i just ordered and i came across a pair of obx headers on ebay, it says it utilizes teh factory o2 position, the same guy also has another obx header that ocmes with the downpipe. and it says it utilizes the factory o2 position and by the looks of the picture it is on the downpipe. i wasnt sure if this was correct or not cus they both say they use the factory o2 sensor but one is just the header and one is the header and a downpipe.??? which is correct

this is the one i am thinkin about gettin http://i84.photobucket.com/albums/k9...untitled-1.jpg i didnt know if that is the right spot where the o2 sensor goes or not. and i figured that the headers would have a stamp or something that say obx? does this look legit