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Upgrading from Garmin GMR21 to GMR18HD?

Old 07-15-2014, 08:47 AM
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Default Upgrading from Garmin GMR21 to GMR18HD?

So I have 2-3210Cs and 1-3206C tied to a GMR21. Will I notice a big difference in performance with these head units if I upgrade to a GMR18HD? I've never been super impressed with the GMR21. Can't really drop the money to upgrade all the MFD's right now.
Old 07-15-2014, 09:47 AM
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Yes....you will see an improvement.

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