I have the LET cooling mods, the HE, C30,178* thermostat. Now the mods do allow for faster cooling down. Stuck in traffic cooling fan still comes on, but once moving the LET stuff does drop the temps faster then normal. Prior to install the temp gauge constantly stayed a click above middle. After mods temps stay mostly on the middle too a click below middle. Hard driving with a lot of boost brings it back up,but it will drop back down in about 2 minutes.