2 fast 2 furious trick

in the begining of the movie when paul walker came to race how did they do that trick when he car blew compressed air and smoke out of the wheel wells... i would like to find out more about that

Purge Kits, it's used to clear out nitrous lines after they have been used, but most people keep the NOS on and clean the lines, which results in the NOS shootong out like that