Once the PCM has been flashed with the new tune, you can remove the Gryphon.
You might want to keep it installed though as it allows you to monitor CHT, TFT, TC lockup, etc.
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"Good judgement comes from experience. Experience comes from bad judgement." - Colin Powell to new batch of 2LTs (while serving as V Corps Commander)
Factory manuals here: http://www.motorcraftservice.com
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