Ye... insurance companies don't see it that way. Its a mod from OEM, Invalidates warranties, and there is a bottle of gas fixed in the cabin of the car. Have to say I have not heard of a bottle ever going bang and a guy who worked for me before use to fit systems and loved them. However I accept that on top of a standard car or modified car it is a further risk, which the insurance just don't like. I would go supercharger over Nitrous