Super cars need new GT Nitrous Kits! Installing GT Nitrous Kits is an easy upgrade. To get the most bang for your buck, invest in a Nitrous Kit. Make a bigger statement with new GT Nitrous Kits. A Nitrous Kit can double your horsepower depending on the size of your engine. Make your vehicle much faster with a new Nitrous Kit. Nitrous Kits are the easiest way to add power to your vehicle.