Garmin GMI™ 20 to GMI 40 Adapter Plate
This item is currently on backorder. You can still place an order, but it will only ship once it’s back in stock.
GMI™ 20 to GMI 40 Adapter Plate
This adapter plate allows you to install a new GMI 40 marine instrument into the existing cutout of a GMI 20 in your dash.

