The HPFP internals must be machined to extreme tolerances and installed in a clean environment or the pump can easily fail. Dimensional tolerances on the APR HPFP are as tight as .00004" and geometric tolerances are as tight as .00005". The plunger and barrel are created from certified and heat-treated bearing-grade stainless steel and the plunger undergoes a special diamond like coating process for exceptional surfaces hardness and ultra-reliable operation.
Fits: Audi S4/S5/RS5 (B9), Audi SQ5, Porsche Cayenne, Porsche Macan. Confirm fitment with us before ordering.
