Qustion about Kooks headers/X pipe Help!

[EJ23]

I ordered the 1-3/4 x 3" Kooks headers, but did not order the X because I was confused about the size. The only option is 3" inlet with 2-1/2" outlet. :dw: I want a FULL 3-inchs in and out. :??: http://marylandspeed.com/product_info.php?products_id=503