1990-1996 Ford F150 Truck with 18 Gallon Tank Rear 1990-1996 Ford F250 Truck with 18 Gallon Tank Rear 1997 Ford F250 HD with 18 Gallon Tank Rear 1990-1996 Ford F350 Truck with 18 Gallon Tank Rear 1997 Ford F350 Truck Over 8500LB GVW with 18 Gallon Tank Rear.