I'm new to dodge and Cummins not to diesels I've owned powerstrokes and a duramax. What upgrades do you guys recommend for a 2008 2500 6.7. Wanting to increase fuel milage and add a little power. Also what programmers and why? I ran efi live on my duramax and bully dog on the ford. What delete kits do you recommend. Thanks in advance i know its a long winded question.
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