The internal temperature is an important index for the prevention and maintenance of a spindle. However. the temperature inside the spindle is undetectable directly because there is no space to embed a temperature sensor. and drilling holes will reduce its mechanical stiffness. https://www.bekindtopets.com/quick-find-Tuner-DT8170010007060-Optimized-Stock-Tune-Only-for-EFI-Live-Spade-2016-Colorado-Canyon-2-8L-LWN-big-savings/