Oh nice.. Flapper delete = exhaust flap?
Intake manifold has a flap for cold starts, it sits in the runner and obstructs flow at WOT like a throttle body. The TSI has a revised system such that it lays completely out of the way.
Removing this when stock is not worth your time, removing this at stage 2+ or stage 3 = worth modifying.
I spoke with an employee who has it on their Golf R and he told me the tune is being optimized and the hardware will be offered with an accompanying tune.