GooDeal Engine Air Intake Hose 16578-4S100 for Nissan Frontier Xterra V6 3.3L 1999-2004 Replacing OE#: 16578-4S100; Interchange Part Number: AIF551025N, 50GE520GT Please check the compatibility (according to the OEM part number) before your purchase. Return your air intake system to proper functioning with Air Intake Hose. Constructed of high-quality rubber, the hose resists the drying and cracking that commonly cause check engine lights and drivability issues. Direct replacement for a proper fit every time; Designed to accommodate all necessary PCV and emission fittings. Hose slides on easily for trouble-free installation; Rigorous quality control measures have been undertaken to ensure that this part conforms to product standard.