This listing features a set of six Atlas CC5 652405 Crankcase Breather Vent Filters, designed to be a direct replacement for various part numbers including FB106, AF26, 88976, 652412, BA6591, and FB106B. These vintage parts were manufactured in the United States and have a smooth finish. The filters are sold as a unit type with a quantity of six and are not intended as a performance part. Please refer to the provided OE/OEM part number and interchange part numbers to ensure compatibility with your vehicle. Thank you for considering these NOS filters for your exhaust and emission system needs.