{"product_id":"k-n-high-flow-engine-air-filter-for-infiniti-nissan-33-2399-washable-reusable-lifetime-warranty","title":"K\u0026N High-Flow Engine Air Filter for Infiniti\/Nissan (33-2399) — Washable, Reusable, Lifetime Warranty","description":"\u003cstrong\u003eK\u0026amp;N High-Flow Original Lifetime Engine Air Filter (33-2399) is a washable, reusable performance filter designed to increase airflow and support improved engine response for compatible Infiniti and Nissan models.\u003c\/strong\u003e\n\n\u003cp\u003eThis premium replacement air filter swaps directly into the factory air box to boost intake flow without major modification. Built from multilayer cotton gauze and finished with rugged construction, it’s engineered for long service life, reduced disposable-waste, and straightforward maintenance. K\u0026amp;N tests its filters under demanding conditions and backs them with a limited lifetime warranty, making this a popular upgrade for drivers who want reliable performance gains and lower ongoing filter costs.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this filter affect my car's performance?\u003c\/h3\u003e\n\u003cp\u003eUpgrading to the K\u0026amp;N high-flow filter increases the volume of clean air available to the engine, which can improve throttle responsiveness and can help engines breathe easier under load. Gains are vehicle-dependent and most noticeable during acceleration and at higher RPMs. The filter’s media balances filtration and flow so you retain protection from contaminants while allowing improved airflow.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-flow cotton gauze media increases intake airflow compared with many stock paper filters\u003c\/li\u003e\n  \u003cli\u003eDesigned to support smoother throttle response and potential power benefits under real-world conditions\u003c\/li\u003e\n  \u003cli\u003eEngineered to trap dust and particles while maintaining airflow\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance does a washable K\u0026amp;N filter require?\u003c\/h3\u003e\n\u003cp\u003eK\u0026amp;N filters are pre-oiled and ready for installation and only need periodic cleaning instead of frequent replacement. Under typical highway driving the suggested cleaning interval is about every 75,000 miles; more frequent service may be required in dusty environments. Cleaning uses K\u0026amp;N cleaning and re-oiling products and can be completed at home with basic tools.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClean every ~75,000 miles under normal highway conditions\u003c\/li\u003e\n  \u003cli\u003eUse K\u0026amp;N cleaner and re-oil for best results\u003c\/li\u003e\n  \u003cli\u003eSimple removal and reinstall—no complex modifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles is this filter compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis specific K\u0026amp;N part (33-2399) is designed to fit a range of Infiniti and Nissan models from mid-2000s through late 2010s. It slips into the factory airbox and retains OEM-style fitment so installation is quick and reversible. Always check fitment against your vehicle year and model before purchasing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInfiniti: G35 (2007–2008), G37 (2008–2013), Q40 (2015), Q60 (2014–2015), QX50 (2014–2017)\u003c\/li\u003e\n  \u003cli\u003eNissan: 350Z (2007–2009), 370Z (2009–2020), Fairlady Z (2009–2017), Skyline models (2007–2014 depending on trim)\u003c\/li\u003e\n  \u003cli\u003eDirect-replacement design for easy drop-in installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose a K\u0026amp;N lifetime filter over disposable paper filters?\u003c\/h3\u003e\n\u003cp\u003eK\u0026amp;N’s washable filter reduces ongoing filter purchases and waste by serving for the life of the vehicle when maintained correctly. The multi-layer media and treated cotton gauze provide durable filtration while offering durability and consistent performance. K\u0026amp;N’s limited lifetime warranty and U.S.-based manufacturing add confidence for owners seeking a long-term filtration solution.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWashable and reusable—reduces landfill waste and replacement cost\u003c\/li\u003e\n  \u003cli\u003eConstructed with multiple cotton gauze layers and a tackifying treatment for contaminant capture\u003c\/li\u003e\n  \u003cli\u003eProudly made in the USA and supported by a limited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this filter for? Drivers of compatible Infiniti and Nissan models who want a dependable, long-lasting intake filter that improves airflow, lowers lifetime filter costs, and reduces replacement frequency. It’s well suited to owners who perform routine maintenance, drive in a variety of conditions, and prefer an easy, bolt-in upgrade that’s tested for real-world and track-level durability.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the K\u0026amp;N 33-2399 fit my 2010 Nissan 370Z?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—the K\u0026amp;N 33-2399 is compatible with Nissan 370Z models from 2009–2020. Confirm by matching the part number to your vehicle’s airbox design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I clean this K\u0026amp;N air filter?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Under typical highway driving, clean about every 75,000 miles; in dusty conditions clean more frequently.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":48084019839134,"sku":"B001C4SL04","price":87.78,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/k_n-filter-front-packaging_cbe8999e-260e-4747-bc11-08d7a6c69837.jpg?v=1785843690","url":"https:\/\/northtrailauto.ca\/products\/k-n-high-flow-engine-air-filter-for-infiniti-nissan-33-2399-washable-reusable-lifetime-warranty","provider":"North Trail Auto","version":"1.0","type":"link"}