Cold Air Inductions Inc. CF-8400 High Performance Air Filter Lifetime use washable air filter (only to be recharged with a Cold Air Inductions Inc. recharge kit) Pre-oiled from the factory and ready for immediate installation Engineered smooth bore tube stop and radiused velocity stack to reduce turbulence and increase airflow 8 Layers of interwoven cotton gauze filter media, capable of trapping down to 5 microns for superior filtration Direct filter replacement for Cold Air Inductions Inc. cold air intake kit part #'s: 501-1099-10, 501-1099-10-B, 501-1099-10-M, 501-1099-10-MB, 501-1099-10-S, 501-1099-10-SB, 701-3942, 701-3942-B