run the hose in side your air intake, and put the nozzle inside the intake also.. so the only thing you need to hide is the hose going into the intake, and to make it look normal use the hole in the intake for venting the valve cover to feed the no2 line through, feeding the no2 line through a rubber hose will hide it very well..only hard part is making a bracket inside the intake (bc most cai's are aluminum)