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smartys03

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  1. Cowboy24v

    Smarty S03 Programmer on stock transmission

    So I just ordered the Smarty s03 programmer for my 2002 Cummins after hearing many great things about it, currently running the Edge EZ that was on the truck when I bought it. I'm curious what best level to run the tune on my stock automatic 47RE transmission (which are obviously notorious for being...
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