Have had some idle issues of late on my Si4.

Had been recommended by a mech friend to give the following ago.
https://www.liqui-moly.com.au/products/pet...carb-2733/

Reviews speak highly of it. Much better than Seafoam and the alike. I’ve used the latter on previous non turbo engines.

Challenge is, I’m not 100% sure where I should be spraying. It says the inlet manifold. However, would this be the down pipe that runs to the turbo on this engine? I can’t locate the throttle body.

Have Googled, but can’t seem time find a decent engine diagram.