Answer for Electric sheep, Ithe leo vinci is a full system and does require a powercommander to be fitted(so long as you have the latest ECU fitted). Cost is £1600 +vat for the 54mm and £1800 +vat for the 57mm. You will also have to add the cost of altering the pipes to clear the swingarm and to have the PC111 fitted and set up(about £5-600). The 54mm is quite ok if you are not going any further in the future but well worth spending the extra £200 if you want to go the cam and head route later on (as i do). hope this helps Butch |