The AY-SB and AY-MB Airinx air filters are made with a special dry element and then placed between our new dual chrome ABS spiral cages. Our special double-ply element uses 2 layers of 3 dimensional urethane foam (with different textures) to increase filtration and maximize intake airflow. The outer ply has a large opening while the inner rough layer is made up of a fine foam. The outer cage is a spiraled straight-fin design which helps promote air intake. The chrome finish can dress up any high performance engine compartment and is available in two compact sizes. Numerous funnel adapters in different sizes and styles and an extensive line of application specific bolt on kits