APR High Pressure Fuel Pumps - S5 4.2L V8 (Pre Nov 2008) (MS100076) _23589 Adjustable from 20 psi to

Adjustable from 20 psi to maximum fuel pump capacity

Use APR pulley software for more gains

Heavy-Duty Performance: The pads and rotors are designed to handle the demands of heavier and more powerful vehicles

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APR High Pressure Fuel Pumps - S5 4.2L V8 (Pre Nov 2008) (MS100076) _23589 Adjustable from 20 psi toThe APR High Pressure Fuel Pump (HPFP) increases maximum volume of fuel the HPFP can deliver by 41% over stock! In doing so, the direct injection fueling system is capable of satisfying fueling requirements set forth by high horsepower setups. This is accomplished by increasing the displacement of the pump using high quality components to exacting tolerances. How the direct injection system works: A low pressure fuel pump (LPFP) in the fuel tank