Check the listing for details. 20420-00 Nitrous Express Proton Series Nitrous System - Bottle Not Included. Color: Black, Condition: New. Listed at 472.68 USD. 20420-00 Nitrous Express Proton Series Nitrous System Description: Proton Series nitrous systems combine performance, durability and value in a compact and easy to mount module. Proton systems contain high quality, made in the USA, solenoids that are capable of producing 250 horsepower to the wheels. The black anodized aluminum housing not only looks great, it pulls heat away from the solenoids for extreme durability. This system fits all electronic fuel injected vehicles with a single throttle body. This Proton system includes: Piranha nozzleStainless braided nozzle linesBraided stainless feed lineMaster arming switchPush button activation switchJetting for 35HP, 50HP and 75HPNitrous Bottle Not Included Shipping is FREE inside the contiguous United States. If shipping to Alaska, Hawaii or Puerto Rico please message us for a quote for additional shipping costs.