well based on most cops girth, I say run the lines under a very low Mustang, tell him its unhookedFunny story... the Street Racing legislation in Ontario kinda says you can have nitrous... you just can't have it hooked up.
Nitrous oxide fuel systems prohibited
172.2 (1) No person shall drive or permit to be driven on a highway a motor vehicle equipped with a nitrous oxide fuel system unless,
(a) the part of the nitrous oxide fuel system comprising the canister, bottle, tank or other store of nitrous oxide is completely disconnected from the other parts of the system;
(b) the disconnection can be observed by looking at the interior or exterior of the motor vehicle; and
(c) the disconnected parts cannot be reconnected from the driver or passenger seats.
he is more than welcome to take a look under car, should be safe me thinks.