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.

What's included
 
X1 (Bosch) BMW 13518631642 High-Pressure Fuel Pump (HPFP Bosch Brand)