One peculiar aspect of Japanese orthography is that words written on the right side of a vehicle can occasionally be written in reverse, or simply mirrored, in much the same way that the US flag is reversed on the right side of US aircraft and on soldier’s arms
Many of the drift cars during the Golden-era of D1 had the style of mirrored livery pictured below. Unfortunately it is less common these days
JDMism 
For clarity–the reversed US flag on the right side of a vehicle is to ensure the flag is always ‘pointing forward’ when carried by a theoretical flag bearer. For the flag to be displayed normally on the right side would mean that a flag bearer is retreating (running backward rather than forward when viewed from the right side). Thus, it is reversed on the right side to show that the flag bearer is always moving forward.
If this is the reasoning behind the reversed text on drift cars, that would be an interesting parallel!