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John Deere Power Systems’ PowerTech PVX 6.8L above 130 kW (174 hp) and PowerTech PSX 6.8L engines are certified by the Environmental Protection Agency (EPA) and European Union (EU) as compliant with the Interim Tier 4 and Stage III B regulations. The PowerTech PSX and PVX 6.8L engines join the certified 9.0L engine models. The certified PowerTech PVX 6.8L offers a power range of 138 – 187 kW (185 – 250 hp), while the PowerTech PSX 6.8L offers 168 – 224 kW (225 – 300 hp). PowerTech 6.8L engines will go into production in September 2010.