do you need spark aresters in your state?
FMF fattys with turbine core silencers or toomey T5s are both good pipes for low to mid power are still have decent topend power but not great on top.
coolhead, v force reeds, a K&N filter and remove the airbox lid, 4degree timing plate, tors removal kit,and maybe an mx port by FAST racing, would be a great start!
the sky and your bank acount are the liimit