hahah lmao, same thing happened to me at Knox aswell!!
got pulled over on Burwoord Highway by cops, they took my licence and took me to follow them around with my car to the rear carpark where they had a defect station and EPA setup with decibel testers
got defected and also done by EPA for zorst being too loud, luckily i didnt get a fine cause i was being as polite as possible and playing dumb with them, only had to pay for RWC
out of about 20 cops being there about 15 of them came up to my car and started checking 4 defects: bold tyres ride height etc