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Wanted to update this thread. Anyone wanting to install a Marlin or Inchworm "lefty" transfer case; A URD y-pipe will allow you to install the "lefty" without further exhaust modifications. The only problem is if you add the Budbuilt tummy tuck crossmember the URD crossover pipe under the transmission becomes the lowest object in the under of the transmission and is lower than the frame rails.

Has anyone done a "lefty" install with a Doug Thorley Y-pipe? Does the DT y-pipe stay above the bottom of the frame? Did you have to modify it in anyway?
 

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I'm running the URD Y-pipe on an otherwise stock exhaust system. I didn't notice any sound change, the URD crosses under the transmission so it gives more clearence under the transfer case, and it eliminates the back pair of cats and with no check engine light.
any issues with the transmission temp with the URD Y pipe?
 

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I am interested in this y pipe you posted yet the web address finds nothing!
 
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