Deleting OEM Donut Gasket on Exhaust System
 

So I was looking to get the Remark midpipe but it removes the donut gasket and has a flange on flange joint instead. Do you think this will cause more fatigue on the rest of the exhaust system? I'm going to run it with the oem headers and front pipe.

It will be fine. Torque it properly and drive it for a few days and torque it again since it will loosen up after a few heat cycles. Good to go after that.