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What is the maximum allowable size for adding a rear spoiler?

1 Answers

McColin

07/30/25 10:40am

The modified rear spoiler must not exceed 300mm. Currently, the "Motor Vehicle Inspection Work Regulations" have relaxed some restrictions on vehicle modifications, but the policy does not support spoiler modifications. Installing a spoiler that alters the vehicle's appearance is illegal, so it is not recommended to modify the spoiler. In fact, even small ducktail spoilers attached to the rear of the car with 3M tape will fail the annual inspection and may be stopped by traffic police on the road. Relevant information about car modifications is as follows: Regulations: According to the motor vehicle registration regulations, if the owner changes the body color, model, performance, purpose, or structure of a licensed motor vehicle, or replaces the frame, body, or engine, they must apply to the vehicle management office for modification registration. Benefits of modifying wheels: Installing a good set of wheels can improve heat dissipation and achieve lightweight goals, providing high visual impact both statically and dynamically, and enhancing the vehicle's handling performance. Increasing the diameter and width of the wheels and lowering the profile can overall improve the tire's grip.

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