I recently read that a lot of online sellers have changed their kits to include cats because the EPA won't let them sell "cat delete" kits anymore. If you don't want cats, you may have to go to a local muffler shop.
As Chris said above, first order your dual exhaust cross member.
I have duals on mine with an H pipe, Walker Turbo mufflers and the stock cross member. The guy at the muffler shop ran it a tight to the cross member as he could without it hitting! I have had no problems at all! Works just fine! but the other route is an option! Good luck!