What horsepower levels can this kit achieve?

The Nitrous Express Gemini Stage 6 kit includes jetting for a range of horsepower increases, from 50 HP up to 300 HP. This allows you to select the power level that best suits your needs.

What components are included in this nitrous kit?

This kit includes the Gemini nitrous plate, a 5lb nitrous bottle, stainless steel bottle brackets, Lightning solenoids, a heavy-duty 40-amp relay, and a 4AN long supply line. Jetting for multiple horsepower levels is also provided.

Is this nitrous kit street legal or CARB approved?

This nitrous kit is not CARB approved and cannot be shipped to California. It is intended for off-road use or racing applications where permitted.

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Specifications

Brand: Nitrous Express
Part #: 60040-05
UPC: 653374304085

Nitrous Express 4150 Gemini Stage 6 Nitrous Kit (50-300HP) w/5lb Bottle

Name: Nitrous Express 4150 Gemini Stage 6 Nitrous Kit (50-300HP) w/5lb Bottle
Brand: Nitrous Express
SKU: nitrous-express-nitrous-express-4150-gemini-stage-6-nitrous-kit-50-300hp-w-5lb-b-t14-339888
Price: 954.52 USD
Availability: BackOrder

$954.52

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Nitrous Express 4150 Gemini Stage 6 Nitrous Kit (50-300HP) w/5lb Bottle. Get up to 300HP with advanced direct-port distribution.

Key Features

Fits standard 4150 flange carburetors.
Direct-port nitrous and fuel distribution for improved cylinder filling.
Includes jetting for 50, 100, 150, 200, 250, and 300 horsepower levels.
Comes with a 5lb nitrous bottle and stainless steel bottle brackets.
Features Lightning solenoids with a limited lifetime warranty.
Includes a heavy-duty 40-amp relay and a 4AN long supply line.

This kit is designed to fit standard 4150 flange carburetors. Always check manufacturer specifications to confirm compatibility with your specific vehicle's carburetor setup.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're looking to add serious horsepower to your vehicle, the Nitrous Express 4150 Gemini Stage 6 Nitrous Kit is a well-built system designed for performance. This kit is specifically engineered to work with standard 4150 flange carburetors, making it a popular choice for muscle car and performance builds. It offers a direct-port nitrous and fuel distribution pattern, which is a significant improvement over older spray bar designs that can lead to uneven cylinder filling.

What sets the Gemini plate apart is its advanced design, which minimizes airflow restrictions by eliminating spray bars altogether. This means you get a more consistent and potent nitrous-fuel mixture delivered directly to each intake port. The kit comes with jetting for a wide range of horsepower gains, from 50 HP all the way up to 300 HP, allowing you to tune your power output precisely. It also includes a compact 5lb nitrous bottle, stainless steel bottle brackets, a heavy-duty 40-amp relay, and a long 4AN supply line for a complete installation.

This system is a leading option for those seeking a reliable and powerful nitrous injection. The Lightning solenoids are backed by a limited lifetime warranty, giving you peace of mind. Remember that this kit is not CARB approved and cannot be shipped to California. Always consult the manufacturer's installation instructions for proper setup and safety guidelines.