These nozzles are a great addition to a single nozzle for splitting jetting equally over two banks of cylinders (v type or boxer engines) when used in a pair as one per intake plenum, or for jetting to each individual cylinder when fitted one per intake runner in the intake manifold.

Splitting the jetting as opposed to using a single nozzle, improves nitrous distribution through the engine, and can improve overall power production, as well as increase reliability. Differences of 15% overall force on the crankshaft and connecting rods can be seen where a single nitrous distribution point is used. When running high jet sizes and therefor high overall power additions, the engine reliability can be severely compromised. Using additional equal distribution points can reduce this factor to less than 2%, a difference which can actually be attributed to differences in the compression ratio cylinder to cylinder, rather than differences in the nitrous distribution.

A must have item if you are running more than a 25hp per cylinder power addition.