This Drop-In Tank catalyst (FFB08) is used for pre-1980 Classic/Antique vehicles. Drop ONE at a time, into the fuel tank. You may use a piece of 2 - 3’ plastic or rubber hose to guide the catalyst cartridges into the fuel tank.

Vehicles manufactured AFTER 1980, usually have an anti-siphon obstruction that will prevent drop in catalyst cartridges to be installed through fuel filler cap. Accessing the fuel tank directly through fuel pump panel or removing filler assembly under the vehicle or dropping the fuel tank may be necessary to get these drop-in catalyst cartridges into your vehicle manufactured after 1980.

Automotive Gasoline Fuel Tanks - 35 gallons or less

Automotive Diesel Fuel Tanks - 20 gallons or less