From an insurance point of view aftermarket boost controllers are seen as an instant decline on insurance from some companies. This means the insurer will not insure a car with this mod.

Your best bet is to call your insurer and find out what the company guidlines are for Mods and what they cover and what they will not cover.

Insurance companies have to assess risks associated with mods. From what im aware in an insurance point of view,
Boost controllers = More Power
More power = Higher speeds
Higher Speed = More of a risk of total loss accidents

But as it has been stated call your insurer to confirm as they all have different guidlines concerning performance mods.

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Werewolf Barmitzvah.....