Hi Norm, no doubt that is what it says. I dont think we are over 105 even with an uncorked exhaust. Unless it is foggy or hig humidity.
I have raced here at least 30 times and it can be quirky for sound. The sound is measured between T5-T6 on the right side of the track. It is measured by the county since this is a county park. You will have one warning and then you are done for the weekend if you are caught again.
So if your car is even close to 105 bring a muffler to add or a 90 degree tail pipe you can face away from the sound station.
See you all there in my rear view mirror.