efi costs lots of money!!!!!!!!! standard gearbox's handels a true 200 bhp about! and unless you want to pay more for the uprated gearbox's ££££ and £1000+ for efi you had may aswell run mfi as this is good for 220 bhp easy! and mf2 aquamist fifth injector costs about £250 and then run a safe 250bhp. imo until you have covered the basics of you engine and gearbox handling the power save your money and run mfi as you cant get full potential otherwise. i do agree efi is the best way but does not agree with everyone's wallet!!!!