3i pump will not do,its not the same as a rs turbo pump,it will run the car and will be ok upto a certain point,no point in a cossie pump as youll see no extra power or fuel as its the metering head that dictates the flow not pump size,unless you can have the meterin head modded which i had on mine then its pointless,ive got a nearly new rs turbo pump,pm me if interested