for intake, run a open airbox (riding conditions detirmined) and a k&n filter is the best from what i hear, then i good price pipe that most people prefer is hmf, there decently priced on ebay, id say stay away from dg or cobra exust
Go for a K&N high flow air filter with no airbox lid and a supertrapp exhaust pipe thats what i was running and i loved it and it was tunable to whatever you like.
thats the problem asking for the best you get about as many answers as there are people it comes down to how much you can spend, because some of the pipes get pretty pricey.