https://ssnperformance.com/4-e....xhaust-muffler-pipe-
This is convenient if you’re seeking a single tune to install on your vehicle. Once the 4 week expires the tune that is currently in your truck will remain. Upgrading to Full support will give you access to all tuning and software updates indefinitely. If your DPF is plugged up your probably averaging about mpg. More or less depending on the severity of the restriction. After installing the SCT X4 / Bully Dog BDX and deleting the DPF/CAT expect to get a combined mileage of mpg.
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