There is a big difference between street cars and race cars in terms of modification concept and modification method. Race car modification is strictly regulated by the race regulations, which means that in some parts of the car, not even a single screw can be changed, but there are some places that can be changed drastically. In order to improve the performance of the car, the modification can even put what the sound noise, fuel consumption and ride comfort, etc. completely ignore, and furthermore, most of the teams will be the engine and trip computer and other important parts of the factory safety margin completely overdrawn (such as higher rpm before changing. The oil is cut off), to push the car's performance to the limit, and the durability of the car? The durability of the car? Don't think about it at all, as long as it's good enough to finish the race, it's fine. In addition, racing tuning can also completely disregard the car's adaptability in different environments, because the team personnel will make special one-off settings for the car according to the special requirements of different drivers, circuits and weather before each test drive or race. All in all, there is only one main theme in race car tuning - to increase the "lap time" of the car on the track at any cost.
Street cars (i.e., the cars we drive in our daily lives) are not in the same situation, nor can they be so extreme as to make any sacrifices in the pursuit of speed alone. In addition to the need to comply with automotive safety and other environmental regulations, the durability of the car, practicality, all-weather and adaptability to cope with different road conditions, etc. should be considered comprehensively when modifying, and none of them can do without the other. On the other hand, there is no regulation on street car tuning, so enthusiasts are free to do as they like.