Starting fluid injection systems are not engine heaters, but instead inject flash fuel (ether) into the intake manifold, resulting in a smooth, fast, dependable cold weather start. Starting fluid injection systems are fast, safe, dependable and let you start every time. Owners and operators of diesel and gas-operated equipment have long known that delayed starts and slow starts mean big money losses in labor, maintenance and operating revenue. Kats ether start systems are truly superior heavy-duty patented products. Components are 100% made in the USA.