that dont already come with turbos dont have recirc valves. kenny is right, blow off valves make a cool sound, and are inferior to recirc valve, until about 600hp when the recirc valve supposedly cant flow enough...you wont need that power for a drift car. the only reason i have ssqv's is because the kid before me put them on, and im really thinkin about getting the hks recirc kit, or even selling them for a pair of recirc valves and putting the money to something else.