Having issues with applying twin turbos to the McLaren F1

So i was tuning this car and wasn’t satisfied yet with what i had at the moment, so decided to try and download a tune and compare. Didn’t really made much difference so i decided to reset to default upgrades and start over again. This is where the problem arise where i cannot change the aspiration to twin turbos even though its in the menus and has the icon that i bought it. When i try to apply it, nothing happens, i can see the PI change from naturally aspirated to twin turbos but i can not select/save it.

Its weird because some tunes that are available do have turbos on them, why can i not apply them? Also seems like it shows the TT upgrade costs 1800$, but i have already bought them and still can’t apply them or re-buy it.

Made a small video of it to show it, how do i fix it?

I vaguely remember a similar bug in FM6. I think the issue that time was with the supercharger. The only fix was to buy another car and then buy the part before you downloaded a tune.
You were then able to remove the tune and install upgrades manually.

Hmm that is too bad, since it’s not a cheap car but i will give it a try tomorrow. Can always sell this one to make up for it. Thanks

Maybe try it with 2 cheaper cars first and see if it fixes it

If you reset the car to stock can you then do it
Even homogulate it then start adjusting again

Already tried this before making the topic, it did not work unfortunately.

Bought a new one from the AH and it seems to have no issues on this one.

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Try to delete the tune you downloaded first. And see if that works.

Have not tried that, might it ever happen again i will give it a try.

I “fixed” it by just buying a new one and put mine on the AH.