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Users interested in Powerspec downloads generally download:

PowerSpec 4.3 Free

The use of PowerSpec is supported in North America only. For engines equipped with a Diesel Particulate Filter, Ultra Low Sulfur Diesel Fuel is required. Failure to do so can permanently damage engine and aftertreatment systems within a short period of time. This damage could cause the engine to become inoperable and affect the warranty coverage on the engine.

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— Will the Cummins PowerSpec software work with the Paccar PX7 engine?

PowerSpec is used with the Paccar PX8 engine successfully. It gives detailed report and it allows you to diagnose and observe the behavior. This means that you can use PoweSpec for your needs regarding the PX7 engine.