The revolutionary “Diffuser” system uses a 2-piece stainless insert that provides the optimum spray efficiency of nitrous and fuel via a 360° radial spray pattern. This type of system provides perfect distribution of nitrous oxide and fuel, delivering the most horsepower possible. Nitrous is injected into and through the “Diffuser” plate creating a highly atomized air fuel ratio in the plenum of the manifold. This even distribution avoids the irregular fuel burn problems and leakage found with spray bar systems, resulting in lost power. The “Diffuser” nitrous system is tunable for a 100 to 500 horsepower boost per system and is compatible with any square flange, four-barrel carburetor application.