EFI Perimeter Plate Nitrous System - Square Flange

  • Adjustable from 100-to-300 HP
  • Includes jetting & TPS-switch for EFI applications
  • Nitrous & fuel are injected via 12 points around intake plenum
  • Includes everything for a safe, proper installation
  • Fits any square flange intake manifold

 Perimeter Plate Nitrous System

For years, if you wanted to put a plate nitrous system on your formerly carbureted, now EFI manifold, you had to buy a carburetor plate kit and try to make it work by guessing the correct jetting for the application. ZEX™ developed the industry’s only complete nitrous system specifically designed for popular square flange EFI conversion manifolds. You can now get all the benefits from the latest Perimeter Injection™ Technology in a powerful and safe, easy-to-install EFI nitrous kit that can instantly add anywhere from 100-300 horsepower!


  • Adjustable from 100-300 HP

  • Fits any square flange / 4150 intake bolt pattern

  • Nitrous & fuel are injected via outlets placed at 12 points around intake plenum

  • Includes jetting & TPS activated switch for EFI applications

Patented, Revolutionary
Perimeter Plate Technology:

Cryo-Sync™ Technology

The ZEX™ Perimeter Plate routes the nitrous through a set of internal passages before spraying it into your engine. During this circulation process, the nitrous temperature drops to -127 degrees below zero! This cryogenic phenomenon effectively turns the plate into an ultra-efficient Cryo-Sync™, cooling your carburetor and intake manifold for additional power.

Airflow Enhancement™ Technology

The ZEX™ Perimeter Plate has been designed to inject the nitrous at an optimized angle, toward the center of the intake plenum. In addition to ensuring proper cylinder distribution, this ZEX™- developed technology creates a pocket of intense low pressure just below the carburetor while the nitrous is being sprayed. This low-pressure area enhances airflow into your engine, which further improves power gains.

Perimeter Injection™ Technology

Unlike traditional nitrous kits, the ZEX™ Perimeter Plate employs multiple injection points to create a perfectly atomized blend of fuel and nitrous. This mixture is then fired directly into the center of the intake plenum, ensuring equal dispersal between cylinders. By optimizing cylinder-to cylinder distribution, ZEX™ Perimeter Injection™ Technology generates maximum power without sacrificing engine safety.