You will need a power comander to get a map on the bike, the ecu can't be hacked.
To get any improvements requires a full exhaust system, removing the cat, and exhaust valve, such as an arrow system, which will deffinately require the power comander, and a 'servo eliminator' to convince the ecu the exhaust valve is still there.
The end can does not have to be arrow, just the link pipes.
that about wraps up the power improvements you can gain, and you will get up to 12% for a fair bit of the range, enough to make a good difference when riding.
I hope this helps, look at spending up to a grand.