They have done tests on these cold air intakes, that show they do nothing for power, but if noise is what you are after then buy one, if you are looking for performance forget about it.
Same go's for K&N filters they do absolutely nothing, then after using and cleaning them they start to leave dirt into your engine.
Best bet is to buy a cheaper air filter that fits the stock airbox I like to buy the regular Pureolator they work, but have less resistance to air.
Problem is these filters are a new type they might not make them to fit the Trax until they catch up to the newer cars.