The hands-down best performance modification for a 7.3 Powerstroke is tuning. Tuning can help unlock horsepower and torque all while increasing fuel mileage, improving towing, and help the engine run better overall.
Peakside Performance
1999-2003 7.3L Powerstroke Peakside SCT 2 Tune Package
Part Number: X4-PEAK-PS73-SCT-2FRegular price $787.59 CADUnit pricePeakside Performance
1999-2003 7.3L Powerstroke Peakside SCT 3 Tune Package
Part Number: X4-PEAK-PS73-SCT-3FRegular price $837.59 CADUnit pricePeakside Performance
1999-2003 7.3L Powerstroke Peakside SCT 4 Tune Package
Part Number: X4-PEAK-PS73-SCT-4FRegular price $887.59 CADUnit price