Select GTX turbochargers come standard with a fully machined speed sensor port. Just remove the bolt and screw in the appropriate kit for your application. GT/GTX speed sensor kit not applicable on G Series turbochargers. The Garrett Turbocharger Speed Sensor works with any turbocharger to accurately determine compressor wheel speed. The instructions include detailed drawings of the exact machining specifications for all Garrett GT catalog turbochargers as well as general guidelines for other compressor housing types. The Garrett Turbocharger Speed Sensor Kit includes all necessary wiring for easy installation and simple data logging.