
 fxdecal files go to "GTAV\mods\update\update.rpf\x64\textures\fxdecal.ytd (open and edit with OpenIV)

 wheelfx.dat goes to "GTAV\mods\update\update.rpf\common\data\effects"
		  or "GTAV\mods\common.rpf\data\effects"

	im not sure which one takes priority, just replace both and you'll be fine