Nitrous Express 15140 Pumpless Water Methanol Injection 4150 Carburetor Plate Kit

The Nitrous Express 15140 is a pumpless direct-port water/methanol injection system designed for 4150-style square-bore carburetors. Unlike traditional pump-based systems, this kit utilizes a pressurized reservoir and integrated pressure regulator to deliver the water/methanol mixture without the need for an electric pump — reducing complexity and potential failure points.

Direct-port injection technology routes the water/methanol mixture individually into each intake runner, ensuring precise, even distribution to every cylinder. This targeted delivery maximizes charge cooling, reduces intake air temperatures, and helps suppress detonation under high-performance or forced-induction conditions.

Key Features:

• Pumpless design uses a pressurized reservoir and pressure regulator — no electric pump required
• Direct-port injection delivers water/methanol mixture individually to each intake runner
• Designed to fit 4150-style (square-bore) carburetors
• Includes braided stainless steel AN hoses for durability and a clean appearance
• Billet aluminum distribution blocks for precise flow management
• Filtered nozzles help prevent clogging and maintain consistent spray patterns
• Nickel-plated fittings for corrosion resistance and long service life

The Nitrous Express 15140 is an ideal solution for carburetor-equipped performance engines seeking the benefits of water/methanol injection — including improved power output, reduced heat soak, and added detonation protection — with a straightforward, pump-free installation.