Suddenly... BOLT-INS!!!
Since the 3-4 "supercharger" kit will fit into the intake of the Grand Ville... It will surely be sucked in the intake, thus allowing more air to run into the engine, as its being sucked from the inside now.
If it was this easy to add that much power, EVERYONE would be doing it. Saves weight, easier and cheaper to replace, no nasty oils or mainteance or BBVs to worry with, just more air causing chipped pistons