If you just want the look a fake tip on other side would do that
Space under a tj is kinda scarce already and exhaust pipes tend to block access
However the 1999 WJ 4.0 has 2 separate non minicat exhaust manifolds front three and back three each with its own outlet so for a newer head without mini cat that is the start of dual exhaust but then you would need 2 cats and 2 mufflers really taking up under adage space/access
Knew a guy that replaced the rear balance on a small block stang 68 or 69 with one with indents for dual exhaust so bolted on a 90 degree section so it went out the empty indent and added a chrome tip
Funny thing was the emissions monkey put a sniffer in each tip and he passes despite one tip having no exhaust gasses
I think the sniffers y together so just added lots of clean outside air
I like the baseball card technique. I used in the 50's and since I was a Reds fan those Mickey Mantle rookie cards and Ted Williams stuff made a unique sound. Wonder what they would sound like today? $$$$$
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