Nitrous Express 60540-12 4150 Gemini Twin Pro-Power Nitrous Kit 100-500HP with Composite Bottle

The Nitrous Express 60540-12 Gemini Twin Pro-Power is a complete, single-stage nitrous oxide injection system designed for carbureted engines with standard 4150-flange carburetors. This advanced plate system delivers selectable power increases of 100, 200, 300, 400, or 500 horsepower and comes fully equipped with a lightweight composite nitrous bottle — everything needed for a complete installation.

At the heart of this kit is the Gemini Twin plate, engineered with a unique direct-port spray pattern that delivers precise, even nitrous and fuel distribution to each cylinder. This design specifically addresses distribution problems commonly associated with single-plane intake manifolds, including those found on small and big block Ford engines. Superior atomization and cylinder-to-cylinder consistency set this plate apart from conventional spray bar designs.

Unlike traditional spray bar systems, the Gemini Twin plate eliminates spray bars entirely — removing the risk of bars sagging, splitting, obstructing airflow, or sustaining physical damage. The result is a cleaner, more reliable, and more efficient nitrous delivery system.

Kit Includes:

• Gemini Twin nitrous plate — fits standard 4150 flange carburetors
• Jetting for 100, 200, 300, 400, and 500HP power levels
• 10 lb. composite nitrous bottle
• Lightning solenoids with limited lifetime warranty
• Heavy-duty 40-amp relay
• Stainless steel bottle brackets
• Extra-long 4AN supply line (Race Hose)

The included NX Lightning series solenoids feature CNC-machined aluminum bodies and an optimized internal flow path that eliminates sharp turns and expansion zones, keeping nitrous in dense liquid form for maximum power output per shot. This kit includes a certificate of origin, warranty documentation, and installation instructions.