Get a brand new set of Tsukigi bolt-ons from me for $310.00. They produce decent power for bolt-ons almost the same a few full systems made for the Busa and in one case more than a full system. A few members here have a set and we also made a custom map for a Pipercross race filter, PCIII and the slip-ons...I have the PCIII and slip-ons in stock, PCIII comes pre-loaded with a baseline map which should get you by. This set-up produced 157hp and 95 foot pounds of torque on my dyno.