Should be free under warranty. Dieselgeek part is good fix. If time/scheduling is an issue for you, (easier to do DG part yourself rather than wait however much time for stealer**** to do it) then that will work fine.
If you have them replace the intake manifold under warranty....check the fuel lines at fuel filter & pump, AND the coolant line that runs along top before you drive off.
I had a fuel leak due to unsecure lines at the filter, and a T30 screw from coolant return line missing as well, so that line was vibrating & bouncing freely creating quite a rattle.
Spewed fuel all over the engine bay was a PITA to deal with.