Integrated Engineering's Harsh Climate 5-Inch Air Filter & Sock upgrades any IE 5-inch velocity stack intake with extra filtration for dirt roads, sandy beaches, or anywhere dusty conditions are a regular part of driving. It layers three levels of protection on top of IE's standard performance filter design.The filter itself steps up from 6 pleats to 8 for more cotton density, the pleats are treated with a penetrating filter oil to catch and trap fine particulates, and a pre-filter sock adds a final outer layer of protection over the whole assembly.Important Compatibility InformationThis kit fits Integrated Engineering intake systems built around a 5-inch velocity stack.Features 8-pleat construction for greater filtration density than IE's standard filter Oil-treated cotton media Pre-filter sock adds a third layer of protection Washable and reusable with standard filter care What's Included Oiled 8-pleat performance 5-inch air filter (x1) Pre-filter intake sock (x1) Air filter worm clamp (x1) Ownership NotesClean the filter by washing in water with a small amount of dish soap, rinse thoroughly, and let it air dry completely before reinstalling. Re-oil with any off-the-shelf filter oil kit; a light coat is enough, since over-oiling can affect airflow and, on some vehicles, trigger a MAF-related check engine light.Product Specifications SKU / MPN: IEINUU2 Fitment: Integrated Engineering intake systems with a 5-inch velocity stack Frequently Asked QuestionsWill this fit any IE intake?It fits any IE intake built around a 5-inch velocity stack; if you are unsure which stack size your intake uses, contact your BMP Tuning rep before ordering.How is this different from IE's standard replacement filter?This kit steps up to 8 pleats instead of 6 for more filtration density, adds a pre-filter sock, and is oil-treated for dusty or off-road conditions; IE's standard filter is a dry, direct replacement.How often should I clean it?Clean it when it looks visibly stained or dirty, or on a regular interval if you drive in dusty conditions often.Can I over-oil the filter?Yes, and it is worth avoiding. A light, even coat is enough; too much oil can affect filtration and sensor readings.