Powerstroke 7.3L Turbo SPX Billet Compressor Wheel (5+5 blades) Upgraded Rebuild Kit Combo. Engine Displacement: 7.3 Liter. This kit comes with our 360 degrees thrust system, severe duty journal bearings, turbine & compressor end upgraded oil seal rings, and our SPX billet compressor wheel that eliminates surge, lowers EGT, increase boost pressure, horsepower, as a added bonus, will produce a much louder "whistle" sound over the stock wheel. Benefits of billet compressor wheel. Taller blade design allows our billet wheel to grab more air, and flow better at higher boost levels. 4 - 7 ...