Nitrous Works recommends that the bottle supply line be routed under the carpet or safely underneath the car (i.e. inside the framerail, where its less susceptible to damage). We chose the former recommendation, because we didnt have access to a lift at the time. Review your line routing to make sure it isnt kinked or susceptible to heat or chafing. Its a good idea to use zip-ties or cushioned clamps to keep the line from flopping around.