71 Duster 360 (new project)

So is it only a requirement to tether open exhaust collectors or extensions or do people need to tether their full exhaust cars also?

If you have a full exhaust with mufflers and all...no tethers..

here..you read it...LOL

http://www.nhraracer.com/content/general.asp?articleid=57836&zoneid=132