Yes, that does look out of place. But like you said, the image might just be a placeholder.
What's throwing me off is that the images we see before any info is given also have a car number, not just livery on those helmets. For example, the no. 3 and the Martini colours from the Porsche DLC match the no. 3 917K. But the no. 4 combined with a Gulf livery? All I could come up with was a 2001 R8, which we already have.
I was pretty sure about a GT40 MKII until I noticed that the numbers don't match.
Ugh, I might be reading way too much into this, procrastinating because I should be doing my taxes...