Bottle mounting is crucial to ensure the most liquid nitrous is removedfrom the bottle. It is best to mount the bottle with the valve handlefacing the front of the car and straight up. We wanted to hide ourbottle, and this meant turning it parallel to the axle. To do this, thevalve handle on the bottle must be tilted at a 45-degree angle towardthe front of the vehicle. We went one step farther and mounted ourbottle inside an old duffel bag in the trunk. If somebody wants to seeinside your trunk, all that's visible is a duffel bag.