We are planning a trip up to Canada soon and so we'll definitely need something to help keep the oil temps up. Plus, over the years of flying I have noticed at high altitudes or in winter its tough to keep the oil temp over 165 in cruise and ideally temps should be closer to 180. This is another one of the mods I wish I would have went ahead and did from day 1. Got the TCW servo and butterfly valve installed with not much trouble and it works great! Very happy with it.