I personally wouldn't recommend it. I've not used them myself but I did ask the same question when putting my Fiberclassics Extra together.

I was told that the power around mid range was c.r.a.p. with the 2 into 1. I believe its something to do with varying exhaust pressures coming from each cylinder but I'm no expert, this is just what I was told.

I would get twin canisters for my money.

Hope this helps.