 This is considered a "first generation" big-glass system that integrates the six 3-inch instruments (6-pack) into a more usable package, along with an exceptionally reliable Air Data and Heading Reference System (ADAHRS) that replaces the "spinning mass" attitude and directional gyros.Entegra Release 8 still relies on a 'federated' radio stack (dual G430s) for GPS/NAV/COM capability, as well as audio and transponder.Entegra R9 was meant to replace the original Entegra system in Cirrus Aircraft in 2007 but Cirrus went with the new G1000/Perspective system instead.