I would not go to the trouble of changing anything just yet. Present the car at an authorised inspection station and then change what they advise. If they say the car is fine then you will be a lot happier. If they advise you on the ram pod, ask them what you are required to do to make it pass rego. Follow there lead and then go back to the same place. Don't forget you must return within 30 days of your initial inspection or another inspection fee is payable.