Just buy a mock race, which is similar to the race. The body 150. For example, the imitation match made by Baodiao is about 5000. Even if the sound is not up to your standard, his noise reduction is good. If you want that kind of sound, you can change it to straight row. The car has two or four exhausts, but only one is real and the other is fake. If you don't exhaust, change the exhaust side. The sound inside the line is dull and stuffy, a bit like the sound of a subwoofer. The faster you run, the quieter you are.