its allways been in there LOL easy for this one as it has a knock sensor and filter that suits the engine allready .but it can be added to any engine theres even an adjustable knock filter module on pcmhacking that you can tune to your engine ill find a link.most of our calibrations had the knock sensor turning off after 3600rpm due to noise levels inside the engine false triggering the sensor .can adjust what rpm it activates from and to and has a table to filter knock in noisey ares of the rpm range to dull it down so to speak.
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