Sound Limits At Thunderhilll - Please Read!
Be advised Thunderhil Raceway has a 103 sound limit and mufflers are required. We wanted to remind you of these requirements and let you know they will be strictly enforced. This means anyone attending events at Thunderhill should be fully prepared to follow these requirements. If you are over the 103 limit, you will be blacked flagged. Thunderhill will then give you an opportunity to correct the problem. Once you are back out on track, if you are still over the 103 limit you will be asked to trailer the car or motorcycle for the rest of the day.
We wanted to give you this friendly reminder so you can come prepared and are not caught off guard by sound issues. As always we want you to have a great experience whenever you attend events at Thunderhill Raceway!