i would go get the inspections done (if it is under 95db). then contest the ticket and advise that the officer stated he had cause to open you hood. since he had no cause to issue the exhaust ticket, he had no cause to open the hood. fight it. thats just me, cop caused you hassle....hassle him. take it court and supenia him and have him explain to the judge how he can tell what dp rating your muffler is. i am a jerk though.