Get the exhaust sorted, make sure it's nice and quiet then go to the pits and whinge like hell about how much of a prick the copper was that gave you the ticket. Inspectors absolutely hate how the cops hand out yellow stickers to cars that are basically well looked after road cars.

Also make sure all the basics of the car is working 100%. Indicators, lights, reverse lights, wipers and washers, no play in your wheel bearings, no oil leaks etc etc. Basically make sure the car is road worthy, dont give them an excuse to knock you back because of something silly. They will give your car a thorough going over.

Give it a good clean, show that you take pride in your ride.