To simplify and streamline your installation, these data modules are available in prepackaged G3X system sensor kits. Whether you select the standard or high-performance kit version (for aircraft capable of speeds in excess of 300 kts IAS), your package will include a GPS-aided digital ADAHRS (air data and attitude/heading reference system), a solid-state magnetometer, an outside air temperature (OAT) probe and a configuration module to provide your system with the information it needs.
Good product and good service
GARMIN G3X LRU STANDARD KIT GSU 25C GMU 11 GTP 59 AND CONFIG MOD
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
You would need to determine what you need based on your aircraft. The high performance kit is for aircraft capable of speeds in excess of 300 kts IAS. The standard would before speeds lower than that.