2L na, get a 2.25" exhaust the whole way for back pressure, some nice extractors, and a small muffler. As for intake, standard airbox works better than a pod in the engine bay, the cooler the air the better. You wont get any huge increase in power, but it will help the car "breathe" better.
Probs change the oil, change the spark plugs and she will love you for it.
Cannon exhausts are big and hollow mainly used for forced induction cars...
And red P platers that what to be heard. "Look at me, look at me!"