Update from the factory: the nut had backed off almost all the way. This is what happened when I installed it and when they did after the gasket blew the first time.
Anyone else had problems here? I've had two gaskets blow off the same connection between the Aerie titanium Y pipe and the exhaust. The dealer is charging quite a bit to fix this as well.
My dealer just got back to me. The P1074 error for bank two is because the gasket between the (@Aerie) Y pipe and the (Aerie) exhaust has blown out again.
At the tune of $800 per repair I'm pretty disappointed. The sound through the titanium cat back is terrific, but the reliability is troubling.
Looks nice and clean. If I were going to do it I'd want something fabricated, not tape because it's going to get gummy in the sun, and matte as possible to prevent reflections.