Stand out from the crowd with LS400 Nitrous Kits. To get the most bang for your buck, invest in a Nitrous Kit. LS400 Nitrous Kits are fantastic. A Nitrous Kit can double your horsepower depending on the size of your engine. Look no further for your LS400 Nitrous Kits. Make your vehicle much faster with a new Nitrous Kit. Nitrous Kits are the easiest way to add power to your vehicle.