I'm going to be running a pair of texas speed longtubes with a true dual exhaust setup. I want to get an aftermarket torque arm and preferably one that is relocated off of the tranny and on the crossmember. I also have a moser 12 bolt rear end that the torque arm has to mount to. Can this be done or do I need to just run a y-pipe?

 

Depends on how the front torque arm mount attaches to the chassis. The Spohn, for example mounts to the pads for the stock sheet metal "g-load" brace. That will not interfere with duals, unless you try and mount an X-pipe right under it. Other brands may attach the front mount to SFC's, meaning there may be an interference with dual exhaust.

This is the extreme case of a Spohn TA front mount, dropped because it used to provide clearance for a 4" intermediate pipe from a Mufflex 4" catback. It's also an older design using square turing rather than round tubing. As you can see, there is no interference at all with the exhaust.