RKX Replacement PCV Valve Diaphragm For Porsche Cayenne 4.5L 4.8 V8 94810513207

RKX® PCV / AOS valve replacement kit. RKX PCV valves are regarded as the highest quality valves on the market. Designed to replace broken / ruptured PCV diaphragms on select Porsche Cayenne 4.5L and 4.8L Applications. The dealer does not sell this as a spare part! They want you to replace the entire valve cover assembly.  Includes: - RKX PCV Valve- PCV Cap- PCV Spring - PCV Spring GuideApplications:  Porsche: All Variants of the 4.5L, 4.8L engine *Cayenne V8 4.5: 2003 - 2006*Cayenne V8 4.8L: 2008* On some applications the cap may need a small portion ground down near the breather hose connection point (see photos).