Nitrous Express 4 Cyl SX2 Nozzle Nitrous Kit (100-300HP x 2) w/Composite BottleThe Shark SX2 is the world's finest and only dual stage single nozzle. That's right, one nozzle with two stages. The question: How do you make a nozzle better than the Shark? The answer: Impossible! So we did the next best thinking, we created a single nozzle with dual stages, the 'Sharks SX2'. The design team at NX has spent extensive R&D time making the SX2 perfect. With only one nozzle in the intake port, turbulence of the natural air flow is