No. Although they are physically the same size the two have different back ends making them incompatible as direct pin-compatible replacements for each other. As of August 2000, Garmin is redesigning the GTX-320 for easier production purposes. Bascially, the new GTX-320A will now have the same back end as their GTX-327 digital trasponder. Therefore, the GTX-320 will no longer be available. The GTX-320A with the GTX-327 back end will supercede the GTX-320. Garmin expects the GTX-320A to be available in December of 2000. New price for the GTX-320A will be the same as the GTX-320. In addition, the GTX-320A will be available for over-the-counter sale (does not require dealer installation).