Check the listing for details. Nitrous Oxide Systems SUPER Hi-Flo Bottle Valve Work For NOS 16139 (White). Condition: New. Listed at 55.00 USD. Nitrous Oxide Systems SUPER Hi-Flo Bottle Valve Work For NOS 16139 (White) NOS 16139 White Power and Consistency Supports Over 500 HP Maximizes Flow Two Gauge Ports 16139-15NOS - Super Hi-Flo Nitrous Bottle Valve NOS Performance Parts - Fits: 5LB, 10LB, 15LB and 20LB bottles. Feature: NOS 16139 Nitrous Oxide Systems SUPER Hi-Flo Bottle Valve these new valves provide better flow for more power and consistency, while supporting over 500 HP. These valves feature specially designed passages to maximize flow rate and velocity, twin gauge ports for the attachment of a nitrous pressure gauge or other performance accessories, the exclusive safety venting system with -8 AN fittings for in-car vent tubes, and a standard connection. They're a must for anyone seeking maximum performance. The siphon tube is not include.