Nitrous Express 60040-00 4150 Gemini Twin Stage 6 Plate Nitrous System 50-300HP Less Bottle

The Nitrous Express 60040-00 4150 Gemini Twin Stage 6 Plate System is a wet nitrous oxide injection system designed for square-bore 4150 flange carburetors, delivering selectable power levels from 50 to 300 horsepower. This bottle-less kit gives racers and performance enthusiasts the flexibility to pair the system with their preferred nitrous bottle separately.

At the heart of this system is Nitrous Express's innovative Gemini Twin plate design, which uses a perimeter spray, direct-port injection pattern to achieve cylinder-to-cylinder nitrous and fuel distribution. This approach addresses common distribution issues found on single-plane intake manifolds — particularly on small and big block Ford engines — without relying on traditional spray bars. Eliminating spray bars removes the risk of sagging, splitting, airflow restriction, or physical damage, resulting in cleaner, more reliable delivery and outstanding atomization.

The system ships with six jet stages pre-configured for 50, 100, 150, 200, 250, and 300HP, giving tuners a wide range of power options from a single kit. Included hardware reflects Nitrous Express's commitment to quality, featuring their Lightning Series solenoids — engineered with an optimized flow path that eliminates sharp turns and expansion zones to keep nitrous in dense liquid form for maximum efficiency and power output.

Key Features:

• Fits standard 4150 square-bore flange carburetors
• Selectable power levels: 50, 100, 150, 200, 250, and 300HP — six jet stages included
• Direct-port perimeter spray pattern for precise cylinder-to-cylinder nitrous and fuel distribution
• Spray-bar-free design eliminates sagging, splitting, airflow blockage, and damage
• Solves distribution issues common on single-plane manifolds, especially small and big block Fords
• Includes Lightning Series solenoids with limited lifetime warranty
• Heavy-duty 40-amp relay and relay harness included
• Stainless steel bottle brackets included
• Extra 4AN long supply line (Race Hose) included
• Less bottle — nitrous bottle sold separately

The Nitrous Express Gemini Twin Stage 6 system is a complete wet plate nitrous kit built for serious performance applications, offering race-proven hardware and flexible power tuning right out of the box.