Nitrous Express 20100-12 NX Gemini Twin Stock Manifold Plates with 12 lbs. Composite Bottle for Ford 5.0L Sets the standard for performance and out powers all competitors Phase 3 plates come without the flow restricting spray bars Available in single or dual stage, which includes horsepower settings from 50 to 300 on each stage Center feeds for ease of jet changes and operate on electronic fuel injection fuel pressures Complete with your choice of 5 pounds, 10 pounds, 15 pounds, or 12 pounds composite nitrous bottle, stainless steel bottle brackets, billet nitrous plate, jetting for 50-350 wheel horsepower, all installation hardware