Carburetor 302Cu 351Cu Engine Dust seal Loop Accessories This carburetor is designed for use with 302Cu and 351Cu engines.It includes a dust seal loop to help prevent from entering the engine system.The accessory supports proper carburetor function by maintaining a sealed environment during.It is compatible with specific engine models requiring this configuration of carburetor and sealing components. Disclaimer: This is a compatible replacement part.Any brand or model mentioned is for compatibility demonstration, not endorsement.