The NX Lightning bottle valve flows great, weighs less and looks amazing. The new and improved Lightning bottle valve features, a huge 5/8 siphon tube, a .500 lift stem assembly and a 45 degree outlet for the ultimate in flow and horsepower production. The Lightning valve includes dual gauge ports and weighs ½ pound less than our old style chrome plated brass valve. The Lightning comes standard in many NX nitrous systems and is also available separately as an upgrade for your existing bottle. The lightning bottle valve includes a 4AN bottle nipple as a default but can be ordered with a 6AN, 8AN or 10AN nipple upon request.