Cummins Fleetguard Fleetguard Urea Filter Cummins Filtration Offers A Range Of Def Filters For Cummins And Non-Cummins Engine Applications For Medium And Heavy Duty Truck Applications. All Medium And Heavy Duty Trucks Manufactured On January 1, 2010 And Newer Are Required To Meet Epa Emission Standards Through The Use Of Diesel Exhaust Fluid (Def) As Part Of The VehicleS Exhaust Aftertreatment System. All Def Tanks Are Designed With A Filter To Keep The System Clear Of Debris That May Be Introduced Into The System Which Can Cause The Equipment To Perform Negatively.
