aFe Power 31-10255 Magnum FLOW OER Pro DRY S Air Filter Oil-Free Pro DRY S Filter, 3-Layers Of Progressively Finer Porosity Synthetic "Oil-Free" Media OE Direct Replacement For Easy Installation, Washable & Reusable A/F For Multiple Cleaning Cycles Made with 100% 55 Shore "A" Polyurethane Frame For Durability, 25mm Deep Pleats For Longer Service Cycle Progressive Bump Seal Design requires no sealing grease or gasket, Drop-in fitment for hassle-free installation Manufactured and Assembled in the USA