There is only one o2 sensor... It would have to be more of a 2-1-2. If you had two pipes but one sensor, it might throw off your A/F ratio. You might be able to bypass the need for o2 sensors if a company can reflash the ECU to remove the need for them.
Other than that, anything is possible. Mounting and designing a new pipe would be the hard part. You would have to run it so not to interfere with the suspension travel and other things. You could try a shotgun over/under exhaust, which would probably be easier.