I am running a CPC dragoncat 1000. Dale also told me TWINS !!! I was tired of melting everything under my hood. I am now running a D&D monster single with a D&D Y pipe and it runs great!! the 2 1200 big bores I have seen were both running singles but I couldnt tell you want single. I would bet D&D built a single for their kit. Call Cutlers back and ask dale what pipe he is running on his 1300 turbo. I havent seen that sled for a while but I am 99% sure it had a single on it.
On my 1300 dale told me the slp single works really well. I bought twins but he tried to talk me out of them because he said they are a lot harder to tune. So far no trouble though.