Let's start with the basic before you consider a turbo kit.-Get a good exhaust system. Fujitsubo,Mugen etc.-Upgrade your intake air filter.Preferably those with cold air intake trunkings.-Get a electronic gadget like Apexi VAFC & fine tune your engine parameters.-Install a voltage stabilizer & grounding wire kit to improve your throttle response-Change your crank pulley to a lightweight aluminium crank pulley.It's no use putting in a turbo kit without a good exhaust system & a upgraded fuel delivery system. These are a few basic tuning options for light tuning. You won't want to have a sudden increase of 150BHP without knowing how to handle your souped up beast machine.