BACK 1600cc rebuilt engine. Thats what the PO said. He told me it has less then 3k miles on it. As for dual port I dont know for sure. If you look close youll see the "Weld" we did on the rear right and left. I never said I could weld or do body work. Im a computer geek for goodness sake. Ill also include another piece for the rear to the new owner. I hope you can weld better or know someone who can if this isnt good for you.