thank you thank you for welcoming me to this great site. i own a 04 busa black and purple. well to answer the question of what a stage 3 chip is it goes inline with the intake air temp sensor it tell the comp that the air temp is lower then what it really is. inturn changing the air fuel producing more horses without any type of damage to the engine or electical system. its a german made part and i got mine off of ebay for around $30 bucks. with the help you guys have givin me i'll get back to you and tell you the results. once again thank you guys. curb