Our Cross-Link polyethylene box is engineered to each specific application for low restriction and an increase in air volume. It insulates and protects the filter from engine heat, moisture, dust and debris to provide colder air to the engine for an increase in horsepower. Our Cross-Link polyethylene Air Ducts are sculptured to give the engine less restrictive breathing, That allow for maximum Airflow Velocity and Throttle Response., allow for maximum airflow velocity and throttle response. Our silicone hose connectors provide flexibility while maintaining strength and thermal stability. They won't crack or deform over time like rubber connectors. We only use marine-grade, stainless steel clamps that provide optimal performance to provide a solid seal that won't loosen or deteriorate.