Is there a how to guide to chang the diverter valve please?

btcc2000

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Getting the other halfs Dad's A4 2.0T B7 remapped and i've been told its best to get the diverter valve changed first. Is there a how to guide on here, i've had a search but couldnt find anything.
 
unplug 3 alen bolts
then refin its so easy