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All mods void warranty. Nothing new. My brother tells me FASTA report nails all of them flash or piggy as it shows and uploads max injector flow rates to BMW among many other values which are far exceeded past factory tune values with a JB4 and other piggybacks. You mod they will know but they don't immediately void warranties. With both though if something expensive breaks you can try buying a new DME and code it to the car. That way you start fresh if you're the kind of asshole to go in with something broken for warranty work because of your mods and give them stories about being clueless about it. My brother can't stand guys like that and he sees this all the time.
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