I have just got off the phone speaking to craig from stattlers,he said that there is a lot of money involved for not much power increase..u would need rs4 fuel rail etc etc...also traction is a big issue,even if yr sensible with yr feet..End off the day,it won't blow yr socks off if u sat in a hybrid ko4 car..Craig said its good when u get traction but most off the time u can't