They have a part number for a pre-bent tail pipe on thier site, they also have the full header back systems.

I didn't need or want to pay for thier tail pipe so I plan to just get a piece of pipe bent into a U to dump behind the axle.

The mufflers are Walker Dynomax 17219, got them from Summit. They are off set inlet and center outlet, need the inlet like that due to the rear part of the X being narrow to run up the drive shaft tunnle.