The Stillen intake is basically a replacement for the stock airbox and also comes with a K&N cone filter, but it uses the same tubing.. so basically I just switched it out for a z tube. I bought it for cheap off a guy who never installed it on his car, I dont see how he paid $250 haha

The sound is awesome, I really want to do a plenum and headers next... after talking to an infiniti tech though he's sayin it would be easier to drop the engine when replacing headers, so I'm not sure anymore