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Hello,

I recently purchased a K&N air filter for my 2018 XSR700, and I was told I need to get an ECU as well. Does anybody have any experience with this? I would expect this with the addition of a pipe, but is a $400 ECU necessary just to compensate for the increased air flow of the K&N? Thanks in advance!
 

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You already have an ECU or electronic control unit as it's called. Whoever told you that probably meant ECU reflash but I highly doubt you need a reflash for just a K&N filter
 
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