Precision-woven, 304 stainless steel, outer-screen construction offers triple-layer protection and increased air flow over stock filter, which may require re-jetting or re-mapping. The "triple-layer protection" contains two epoxy-coated layers of strong steel mesh and one layer of non-woven material. It will last the lifetime of your vehicle with proper care. Precision woven #304 stainless steel outer screen construction. Triple-layer protection. Increased air flow over stock filter. Corrosion resistant. Environmentally friendly. Washable and reusable. Will last the lifetime of your vehicle with proper care. Notes: Installation may require re-jetting or remapping. Product may not be legal for sale or use in California or in other localities due to state and/or federal anti-tampering laws.