I found a brand new set of stock headers from a 2009 Ultra Classic for a reasonable price. Since they are '09, they don't have the cats and I'm thinking about buying them and putting them on my 2013 Ultra Limited. Question is..... will they fit on my bike, and would they have the bungs for the O2 sensors? I'd prefer they just bolted right on with no modifications. If I have to modify anything, I'd rather spend more money and get the American Custom headers that will bolt right on with no problems. Thanks.