Hopefully the RPM act gets something done this year:
https://www.sema.org/rpm-bill-summary
The Recognizing the Protection of Motorsports (RPM) Act:
- Confirms that it has always been Congress’ intent that racecars are not included in the Clean Air Act’s definition of regulated “motor vehicles.”
- Makes clear that it has always been legal to modify a street vehicle into a racecar used exclusively at the track.
- Confirms that modifying these vehicles for exclusive track use would not be considered tampering and subject to substantial fines.
https://www.sema.org/rpm-bill-summary