New to DB and I need some info on MP8
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The dealer won't be able to detect the MP-8 by checking the ECM, as it piggy backs on your fuel rail pressure sensor and makes no modification to your computer. If they want to tear into an engine far enough, they can figure out if something has been done. Overall the MP-8 is a pretty safe mod. Just take it off if you have to go to the dealer for service and there shouldn't be any problem.