Mathematical filter for Dodge Charger, Challenger, and Chrysler

Mathematical filter from AirAid company, installed on V6 and V8, never used, taken out of the box only for photography purposes. Reason for selling: I replaced the motor and never installed it. Its new price is over 1500; it's from a well-known company. Search YouTube for Dodge Charger, Challenger, Chrysler to see reviews. Price: 500 Sizes in inches: T6 and T8, two sizes available