Hi Steve,
I also have the 2012 TGB Bullet and am from NZ, once you have done your tuning etc can you post your results to this forum, I am thinking of doing the same with my Bullet. Would be great to know how you get on.
Also if you do decide to import the parts from the US let us know how that goes.
I've been looking at changing my exhaust to a performance exhaust but am not sure what the flow on affect will be, i.e. if I change the exhaust will I then need to do the CDI, Air intake or jets......
cheers
Macca