This is accomplished by increasing the bore diameter of the pump's internal pressurizing cylinder. It's important to understand, despite the name, a HPFP upgrade is not necessary designed to increase the engine's fuel rail pressure.
Fits: Audi S4/S5/RS5 (B9), Audi SQ5, Porsche Cayenne, Porsche Macan. Confirm fitment with us before ordering.
