The Zex Dominator Perimeter Plate Nitrous System: For Dual Side by Side Four-barrel Carbureted Apps. Square Flange Apps is a complete nitrous oxide system that is adjustable from 100-300 HP. Nitrous and fuel are injected via outlets placed at 12 points around each intake plenum for a total of 24 points. Cryo-Sync Technology cools the carburetor and manifold for additional power. The Zex Dominator Perimeter Plate Nitrous System provides optimum nitrous and fuel atomization for maximum horsepower. The ZEX Perimeter Plate Nitrous System is a complete kit that provides the optimum spray efficiency with nitrous and fuel outlets placed at 12 injection points around the perimeter of each the intake manifold openings (24 total). This provides optimum distribution of nitrous oxide and fuel and delivers the most horsepower possible from your kit. Through an ingenious cooling technology called Cryo-Sync, super chilled nitrous is injected through the ZEX plate before being injected into the engine. This rapidly cools the carburetor and intake manifold, generating even greater power.