Why does the piccolina engine look like this?

You have a severely conflicting mod active

 

Is it the 126p?

 

No

 

Then it must be a mod that has a f4 engine exactly like the piccolina
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What could it be?

 

Disable all mods and clear cache.
Then reactivate them one by one so you can find out what mod is causing the issue.

 

I believe it was the ibishu celtia, i removed it and restarted the game and it works, will come back if any issues return

 

The Celtia?
Interesting.