A-AF1632 Filter, Air, Secondary (QTY 1)One New Aftermarket Replacement Secondary Air Filter Fleetguard AF1632 This secondary (safety) air filter serves as a critical last line of defense in a two stage air filtration system, protecting the engine from dust and debris that bypass the primary filter element. Designed to be used in conjunction with a matching primary filter, it helps extend engine life and maintain clean intake air under demanding operating conditions. This is an aftermarket