Nitrous Express GM EFI Dual Stage Nitrous Kit (50-150HP x 2) w/5lb BottleWant more horsepower without the hassle and expense of going direct port? Then the NX dual stage nitrous systems are the way to go. Having two stages means you double your power options at the click of a switch. The dual Shark nozzles give adjustability from 50 to 300 wheel horsepower in 25hp increments. Systems come complete you're your choice of 5lb, 10lb, 15lb, or 10lb composite nitrous bottle, stainless bottle bracket, Lightning solenoids, extra