The EPA, in a new interpretation of the Clean Air Act (1963/1970), seems to have effectively ruled against modifying engines that were ever equipped with emissions devices.

The EPA, in a new interpretation of the Clean Air Act (1963/1970), seems to have effectively ruled against modifying engines that were ever equipped with emissions devices.
Note: All videos are hosted by YouTube, UltraVid.io did not produce this video. If you have any claim on the video then please follow through to Youtube and report at the source.