What is the height limit for spoiler modifications in 2021?
2 Answers
Currently, although the "Motor Vehicle Inspection Work Regulations" have relaxed certain modifications for vehicles, the policy does not support spoiler modifications. Installing a spoiler is considered altering the vehicle's appearance and is illegal; therefore, it is not recommended. Below is an introduction to the regulations on vehicle modifications: According to the relevant provisions of the current "Motor Vehicle Registration Regulations," any changes to the color, model, performance, purpose, or structure of a licensed motor vehicle, including replacing the frame, body, or engine, require the owner to apply for a modification registration with the vehicle management office. Actions such as adding a spoiler, installing wide body kits, or modifying the exhaust system are, in principle, not permitted.
When I modified my car's rear wing in 2021, I researched this issue. The height restriction isn't uniform nationwide—it depends on which state you're driving in. For example, in California, it typically can't exceed the roof height by too much, roughly about 6 inches or so. If it's too high, it may obstruct the rear view and could get you pulled over and fined. I remember that to make rear wing modifications legal, you need to check local traffic regulations—Texas tends to be more lenient. Before modifying, I used the DMV website and car forums to gather information, which proved crucial. Safety first—don't just go for looks, or the risk of accidents increases significantly. I recommend consulting a professional modification shop; they know local rules well and can help measure and confirm. Don't just take your friends' word for it—do your own research before DIY!
