US Diesel Parts is home to a great variety of 7.3L Power Stroke performance parts and stock parts for 1998-2003 models. There were a few notable changes made to the 7.3L Power Stroke in 1999. An intercooler was added to cool the charged air from the turbocharger. The cooler, denser air helps increase horsepower and reduce EGTs. The turbine housing was changed to a .84 A/R and a wastegate was also added. The single shot HEUI injectors were changed to split shot design, and the high-pressure oil pump was advanced to 17° to help increase the necessary fuel pressure. The 1998 7.3L PS was rated at 225 hp, and the 1999 - 2000 models were rated at 235 hp. 2001 - 2003 saw another boost to about 250-275 hp from the factory. We carry an abundance of aftermarket performance options to choose from for the 1998-2003 7.3L Power Strokes. Cold air intake kits and performance exhaust systems will get you a few extra ponies while lowering EGT's and increasing fuel economy. A performance tuner can offer some serious hp gains and also help increase your fuel mileage. Factory and hi-performance turbochargers are also available. Our inventory of stock and performance parts for 7.3L Power Stroke engines includes high-pressure oil pumps, glow plugs, filters, engine kits, fuel injectors, turbochargers, complete engines and more to keep your Power Stroke on the road. If you don't see the 7.3L Power Stroke performance parts or stock parts that you came here looking for, then just grab the phone and give us a call!