How are vehicle modifications penalized?

[TaylorMarie]

Changing the vehicle body color, modifying the vehicle engine (excluding engine type) or frame without completing the modification procedures within ten days will result in a warning or fine. Altering the engine type, modifying the vehicle exhaust pipe, adding rear spoilers, or adding front searchlights will require restoration to the original condition and may incur a warning or fine. For domestic vehicles, replacing tires with non-standard specifications or installing extensive body protection kits will require restoration to the original condition and may incur a warning or fine.