hey, yeh permits cost very lil. last time i checked it was like $35 per mod. dont quote me on it. but it should be around that mark. what they will do is site it, check that it is fitted correctly and working in the proper manor then right down what it is, what it does and what part of the car it belongs to(i think) ie engine. you get a sheet of paper(the permit) saying its all legal and from then on you have to keep the paper in your car at all times. plus you can always add to the list if you wish