Side stripe alignment is a "little" off at the back .LMAO
Most of them are. Some are centered over the rear reflector/light, most aren't.
Those side pipes are supplied with four open primary tubes and three plugs that you can clamp on.
I knew of one 289 Cobra that had them and how dare you say that they weren't functional or suggest that they were only partially functional!
They are or were actually noticeably quieter then the current side pipes for the Corvettes and Cobra kit cars that you can get. Those often need to have inserts installed in them to take the edge off.