o i c. this is like steroids for a cold air intake, ic ic. i can understand a heat sheild/gasket in between the head and the intake manifold sheilding heat from the engine kind of like a heat shield on a turbo but the other stuff honestly...i think it's propaganda.
i think it's a gimick to get you to spend your money. installing your supercharger your going to have to be tuned anyways, tuning is what's going to dictate your computer's quantity of fuel injected. there are cars with intake air temp sensors but they're usually on the airbox or snorkel not in the plenum, thus plenum temperature would be a moot point in the computer's reading of one of those to dictate fuel delivery. the computer however does get information from your coolant temperature sensor which helps dictate richer in cold conditions etc. and having colder air ingested will result in more oxygen molecules to fuel, thus leaner, thus more powerful but a magical gasket that will make your car gain 10 horses, unless it's inbetween the head and the block, i'm gonna be a little skeptical.
basically if the gaskets need to be replaced anyways since you're taking it apart, IF those gaskets are similarly priced then give em a shot what can it hurt, if they're expensive...then you're smaller wallet is compensating for a bigger hope and expectation, a false sense of security that you're paying extra for. i can say though...my old old old old sr20 car beat a lot of cars i shouldn't have beaten and i wasn't running any thermostat, but those winter nights were cold as shit and changing plugs every winter month got to be costly and annoying.
good luck with your car though, i look forward to seeing some pics when it's done