No, the mating connector and mounting rack are different for the KRA-405B. However, the upgrade to the KRA-405B from the KRA-405 is fairly easy and straightforward. Southeast Aerospace offers an adapter harness to utilize the existing KRA-405 harness for the KRA-405B. In most cases, the indicator, antennas and antenna cables are the same for the KRA-405B. For more information, please contact SEA for the KRA-405B Upgrade Kit.