So i got pulled over for speeding and the cop also gives me a fix it ticket for my apexi catback exhaust..WTF?!!

....He tells me when you modify your car to make it louder, its ILLEGAL. So now i need to go to court with the stock exhaust..problem is, i dont have that. So if anybody gots the stock exhaust for sale, please message me! I'll BUY...Thanks!