I had some headers years ago, maybe super comps that had slip fit collectors and a couple of the tubes were slip fit. You could pull and reinstall them quicker than install the easier side of most headers. They were a 2" primary also.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram