If you're looking for an upgrade for your stock turbo, the AFE 46-60072 GT 66mm Turbo is a great option. This direct bolt-on replacement is compatible with all connections on the OE geometry, and includes a billet adjustable wastegate actuator. It's also designed to give you an increase of 49 HP and 124 Ft-Lbs. of torque. So if you're looking for more power and performance out of your 7.3 Powerstroke 1999.5-2003, the AFE 46-60072 GT 66mm Turbo is a great option to consider.
Compressor Inducer: 66 mm
Compressor Exducer: 88 mm/ Trim 56
Turbine Inducer: 76 mm
Turbine Exducer: 67 mm/ Trim 78
Exhaust A/R: 1.0
*Does not fit Econoline Van