Grand National Intercooler Kit can improve the feel of your Buick. The air rushing into the engine is hot, but with an Intercooler Kit, it will be colder. Street or strip, new Grand National Intercooler Kit keep your car one of a kind. Colder air is denser than hot air and an Intercooler Kit helps turbo and supercharged vehicles to produce more horsepower. Limited production, doesn't mean limited options - Check out our Grand National Intercooler Kit. An Intercooler Kit makes a big impression on others. Show off your new Intercooler Kit at your next meet.