aFe MagnumFLOW Air Filters CCV PDS A/F 97-16 Nissan Patrol (Y61) L6-4.5L / 4.8LThis filter features 3 layers of progressive media to provide maximum flow with excellent filtration. The progressive layering of media allows the filter to flow at high levels even when dirty. The Pro DRY S non oiled synthetic air filter requires no oils for cleaning for maximum convenience. The air filter is wrapped in reinforced metal providing maximum strength to prevent filter collapse.