Bosch upgrade HPFP B58TU Hogedrukpomp BMW B58 N20 M140i, M240i, 340i, 440i F
 
If you are looking to make more than around 450WHP on your B58 GEN 1 powered BMW the factory HPFP is going to become the weak link at those levels. This will give you much-increased headroom for making power. This upgrade is good for around 600HP on gasoline.
 
Used as a cheaper alternative to increase fueling demands when pushing past stage 2 power level on a B58 Powered BMW (M140i, M240i, 340i)
 
HDP5 EVO (Stock B58) Fuel Flow – 0.954 cc/rev
HDP6 TU (Z4 / Supra) Fuel Flow – 1.178 cc/rev
Figures are based per camshaft revolution
 
Around 23.5% increase in the fuel flow, which would allow ~600hp worth of fueling capabilities (on Pump Fuel)
The standard fuel pump is capable of a safe 460HP.

Note:
Only for engines that don't have the 13518631642 pump yet!
BMW 1-SERIE F20/F21 140I
BMW 2-SERIE F22/F23 240I
BMW 3-SERIE F30/F31/F34 340I
BMW 4-SERIE F32/F33/F36 440I