OTS tunes are one flash and done, no support. Cobb is a well refined product. Cobb spends a lot of time with R&D. The APs are an all in one unit allowing for a range of features from data logging, flashing, code checking, and other functions like TPMS and transmission service functions right from the handheld. There is a premium to pay both for the development of the hand held and pro tuning software but there are regular updates and features being added. Unlike tactrix, there is a full department dedicated to RD and customer service. (same for EucTeck and Uprev.)
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