I have minitubs and a quadralink with a notched Tanks Inc tank. I am running 3" back to the mufflers. When at home with the car up on stands it seemed to me that I had no chance of getting 3" over the rear on the drivers side. The panhard bar fouls that up nicely. Now that I have the car on a lift I still don't think I can get 3" on the drivers side but I can get a 2-1/2" pretzel in there. But when eyeballing it with the car up and the suspension dangling I realized that the tailpipe, either size, could reasonably pass under the rear and track up to either behind the wheels or all the way back. Have any of you run pipes under the rear? Any ugly surprises?