So... funny thing about the MK8 system... on a MK8. You literally cannot do this because the "boost hose" + Venturi is all integrated within the red part of this diagram.
You could technically cut the big hose in half and run a can in between... but then you're pulling stupid vacuum on the can as well. The way it's set up for the MK7 retrofit, the can only ever sees whatever the TIP is generating vacuum-wise. Plus the little volume of boost from the Venturi.
Any chance you can see if it's possible to log the G950 sensor on your new GTI?
View attachment 301079
Ebay can though for reference... looks like they have an actual online store as well:
https://jackspaniaracing.shop/produ...volkswagen-mk7-golf-gti-2-0t-a3-tt-s3-8v-1-8t
For the record: The Tiguan hose does NOT seem to like to be twisted how it is. I question long term durability. It could eventually leak at some of the joints near the Venturi to hose connections, etc. Understand that if using for a retrofit, you might fuck up a $135 hose.