What is the legal modification range for car spoilers?

[Anthony]

Installing a spoiler on a car is considered an illegal modification. Driving a car with illegal modifications on the road will result in the vehicle being impounded by the traffic management department, the illegal equipment being confiscated, and the owner being ordered to restore the vehicle to its original condition, along with a fine. After the implementation of the new regulations, installing roof racks, modifying the front grille, changing the rims, and adding side steps are all considered legal modifications and do not require registration. Below is an introduction to the relevant content: Content 1: If you want to apply for a change in the vehicle's color or replace the body or frame, it is recommended that the owner visit the vehicle management office to fill out the "Motor Vehicle Modification Registration Application Form" and submit the required legal documents and proofs (including: the identity proofs of the vehicle owner before and after the modification; the vehicle registration certificate; the driving license; a notarized proof of joint ownership, but for vehicles jointly owned by a married couple, the "Household Register" can be provided). Content 2: Interior modifications are arguably the most permissible modifications. As long as they do not affect safe driving, they are generally allowed, but the vehicle's structural features as registered with the vehicle management office cannot be altered without authorization. For example, seats cannot be removed, and roll cages cannot be installed, etc.