Hey guys, I just picked up an '04 that appears to be stock except for an undertail, and an Akrapovic slip-on exhaust. No Dynojet PC, so I'm assuming that should be a must? Its not very happy at low rpm, so I'm hoping the PC will help. Are the PAIR, flapper, and soft-rev mods worth it? What other mods are worth doing, or should I just set the suspension up and go? Thanks