Hello,
I would be that many servers that include modifications on vehicles, would agree with this suggestion.
getVehicleExhaustPosition would get the current position of exhaust on vehicle, setVehicleExhaustPosition would change the position to correct place (to fit modifications on vehicles, such as adding custom bumpers or so), also setVehicleExhaustType for changing type, for example Infernus has only "exhaust" node in DFF file, but displays as two exhausts on each side, mirrored by axis of car. By changing type it would change to only one exhaust, or two. I don't really know how this works in handling, maybe it could be worked on somehow.
Cheers, NoHear.