Dual exhaust car without tip. Turn downs.

For mandatory noise reduction cars in California (440-6, Hemi, other?). Maybe other areas required that too? Also a 383 N code 70/71 Barracuda would get that too. No tip options on those cars I believe.

Maybe 340 72-74 Barracuda (non 'Cuda) got turn downs too? Not familiar with those cars.