More or less the PC3 eliminates the 02 sensor-in the sense it's disconnected, so can be removed. Also, with that setup YOU WILL need a PC3 or the equivalent.
Your bike will flow a massive amount of air and have no backpressure, from idle to redline-as well as looking kick ass!!!
The Jardines have almost no backpressure and require a massive increase in fuel flow (I think the only legit backpressure is caused at the collector b/c from their they are essentially dual 2 inch open pipes).
Good luck and post pics!!