Amazing,that's the first pic of the red internal coloured speed brakes I've seen,all the ones I've trawled through are in olive green.
Although however,if you look close enough at your photo,you can see the green paint showing through the worn areas,I still reckon this red colour is an overpaint of the original factory olive green colour,it was the same Olive Green colour as used in the P-51's cockpits I think.
BTW,I am not casting a critical eye over this issue,just an observational one,the devs have done a great job on this F-86 :thumbup: