aFe Momentum HD Cold Air Intake System

1994–2002 Dodge Ram 2500 / 3500 5.9L Diesel

Part #: 51-72001

Overview

The aFe Momentum HD Cold Air Intake System is a premium airflow upgrade designed specifically for 1994 to 2002 Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L diesel engine. This intake system replaces the restrictive factory airbox and filter with a high-flow, sealed aluminum housing and a large, efficient Pro DRY S air filter. It is engineered to deliver cooler, denser air to the engine, resulting in improved horsepower, torque, and fuel efficiency.

Ideal for both daily drivers and performance enthusiasts, the Momentum HD offers a straightforward, bolt-on solution that enhances engine responsiveness and overall driving experience without requiring complex modifications. Its sealed design effectively isolates the intake from engine heat, ensuring consistent airflow and maximizing combustion efficiency under all conditions.

Key Features

This intake system incorporates advanced engineering and quality materials to optimize airflow and durability:

• Delivers up to 31% more airflow compared to the factory intake for enhanced engine performance
• One-piece sealed aluminum housing with a built-in sight window for quick and easy filter inspection
• Includes a high-capacity POWER Pro DRY S air filter that balances maximum filtration with unrestricted airflow
• CAD-designed roto-molded intake tube ensures smooth airflow transition and reduces turbulence
• Unique filter-to-housing interface simplifies servicing and filter replacement
• No cutting, drilling, or permanent modifications required—direct factory replacement
• Durable powder-coated black finish resists corrosion and wear for long-lasting appearance
• Flexible rubber trim seals the housing against the hood to block engine heat and prevent heat soak
• Includes quality stainless steel hardware for secure and reliable mounting

Construction & Design

The Momentum HD intake system features a rugged one-piece airbox and heat shield constructed from 16-gauge powder-coated steel, providing exceptional strength and resistance to heat and corrosion. The sealed housing design isolates the air filter from the hot engine bay, allowing it to draw in cooler, denser air for improved combustion efficiency and power output.

The intake tube is precision-engineered using roto-molded technology, which creates a smooth internal surface to minimize airflow turbulence. A specially developed three-angle velocity stack further optimizes the transition of air from the filter to the intake tube, enhancing volumetric efficiency and throttle response. Every component is built to withstand the demands of daily driving and off-road use, ensuring long-term durability and consistent performance.

Performance & Sound

By increasing airflow by up to 31% over the stock intake, the aFe Momentum HD system delivers noticeable gains in horsepower and torque. The cooler air charge improves combustion efficiency, resulting in sharper throttle response and potential improvements in fuel economy. Additionally, the intake produces a subtle, aggressive induction sound that enhances the driving experience without being overly loud or intrusive.

Installation & Fitment

Installation is straightforward and can typically be completed in under an hour using basic hand tools. The system is designed as a direct replacement for the factory airbox and filter, requiring no cutting, drilling, or permanent modifications. The sealed housing mounts securely in the factory location, and the flexible rubber trim ensures a tight seal against the hood to prevent heat soak. Comprehensive, step-by-step instructions are included to guide you through the installation process.

What's Included

• One-piece sealed aluminum airbox and heat shield with built-in sight window
• High-flow POWER Pro DRY S air filter
• Roto-molded intake tube
• Stainless steel mounting hardware
• Flexible rubber trim for hood sealing
• Detailed installation instructions

Ideal For

This intake system is perfect for owners of 1994 through 2002 Dodge Ram 2500 and 3500 trucks with the 5.9L diesel engine who want to improve engine performance and efficiency without extensive modifications. It suits daily drivers, work trucks, and enthusiasts seeking a reliable, easy-to-install upgrade that enhances power, throttle response, and engine sound while maintaining factory fitment and finish.

aFe POWER (Advanced FLOW Engineering) offers dyno-proven intake, filtration, and exhaust upgrades aimed at measurable performance gains. The brand’s lineup is geared toward enthusiasts looking for better airflow, improved sound, and durable materials—from cold air intakes to stainless exhaust systems for street and track applications.