USED in working order. Just painted in black ( to hideit) not me. The Zex Dry Nitrous Management Unit is a high-performance part designed for auto enthusiasts looking to enhance their vehicles. This nitrous controller system, manufactured by ZEX, offers precision control over nitrous oxide systems for improved engine performance. With its unit type and specific manufacturer part number, this product is a must-have for those seeking to upgrade their racing or performance vehicles for optimal speed and power.