Well...we all know that AC needs more realistic exhaust flames I've compiled a pack of my own png images and some that I found in a pack for a BMW GT2 livery years ago. Just install in "asssettocorsa/content/cars/[car name]/texture/flames"
These textures do not overwrite the Kunos flame files, so no need to backup!
Courtesy of WagnumPI
Realistic exhaust flames 1.0
Additional flame textures that look...a bit more flamey :D