Used in all Performer EFI "wet" nitrous systems, the patented Edelbrock E1 nozzle is one of the most advanced in the industry. With its unique fuel passage design, this nozzle gives extremely high atomization and is the key to the outstanding performance. Machined from light-weight aluminum and anodized black for durability, the E1 nozzle allows the use of up to 60 lbs. of fuel pressure for a more complete combustion process in the chamber that results in more horsepower. Specially designed fuel outlets enhance atomization, even at lower fuel pressures. Multiple radiuses are used at the nitrous outlet to give the least amount of turbulence and a more precise nitrous spray. The unique fuel delivery angle ensures a complete mixing of nitrous and fuel for optimum atomization. Edelbrock E1 nozzles are a direct bolt-on upgrade for other brands that use a 90 Degree 1/8" NPT design.