aFe Power 30-10241 Magnum FLOW OER Pro 5R Air Filter Oiled Pro 5R Filter, 5-Layers Of Progressively Finer Mesh Cotton Gauze Oiled Media 64% Flow Increase Over Stock, Made with 100% 55 Shore "A" Polyurethane Frame For Durability 25mm Deep Pleats, Progressive Bump Seal Design requires no sealing grease or gasket Drop-in fitment for hassle-free installation Manufactured and Assembled in the USA