aFe Cold Charge Pipe

2019–2023 RAM 2500/3500 6.7L Cummins

Part #: 46-20619-B

Overview

The aFe Cold Charge Pipe 3.5" (REAR) is a premium upgrade designed specifically for the 2019 to 2023 RAM 2500 and 3500 models equipped with the 6.7L Cummins engine. This cold charge pipe replaces the factory component to improve airflow efficiency and reduce pressure loss within the intake system. Ideal for diesel truck enthusiasts seeking enhanced performance and reliability, this pipe helps maximize horsepower and torque by smoothing airflow transitions and minimizing turbulence.

Engineered for durability and long-lasting performance, the aFe Cold Charge Pipe is a direct-fit solution that integrates seamlessly with your vehicle’s existing setup. Whether you are looking to optimize your truck for towing, hauling, or daily driving, this upgrade offers a noticeable improvement in throttle response and engine efficiency.

Key Features

Designed with precision and built for strength, the aFe Cold Charge Pipe includes several advanced features that set it apart from stock components:

• Mandrel-bent aluminum construction ensures smooth airflow with minimal turbulence
• 3.5-inch diameter pipe optimizes air volume and pressure for improved engine breathing
• High-quality stainless-steel, spring-loaded T-Bolt clamps provide a secure and leak-free seal
• Heavy-duty, 5-ply polyester reinforced silicone couplings deliver superior strength and flexibility
• Wrinkle black powder-coated finish offers corrosion resistance and a rugged, custom appearance
• Unique laser-etched aFe POWER logo adds a distinctive visual touch
• Direct bolt-on fitment for 2019–2023 RAM 2500/3500 6.7L Cummins without modifications

Construction & Design

The aFe Cold Charge Pipe is crafted from mandrel-bent aluminum, which maintains consistent diameter and smooth bends to reduce airflow restrictions. This construction method eliminates sharp edges and kinks that can cause turbulence and pressure drops. The pipe is coated with a durable wrinkle black powder finish that resists corrosion and wear, ensuring long-term durability even under harsh engine bay conditions.

Couplings are made from reinforced silicone with five layers of polyester fabric, providing excellent resistance to heat, pressure, and environmental factors. The stainless-steel T-Bolt clamps are spring-loaded to maintain constant tension, preventing leaks and ensuring a tight fit throughout temperature cycles and engine vibrations.

Performance & Sound

By optimizing the airflow path and reducing pressure loss, the aFe Cold Charge Pipe helps unlock additional horsepower and torque from the 6.7L Cummins engine. The smoother transitions within the pipe decrease turbulence, allowing the turbocharger to operate more efficiently. While this upgrade primarily enhances performance, it also contributes to improved throttle response and can complement other modifications for a more aggressive engine sound.

Installation & Fitment

This cold charge pipe is designed for a direct replacement of the factory rear charge pipe on 2019–2023 RAM 2500 and 3500 trucks with the 6.7L Cummins engine. Installation requires basic hand tools and can typically be completed in under an hour. No cutting, welding, or additional modifications are necessary, making it an accessible upgrade for both professional installers and experienced DIY enthusiasts.

What's Included

• 3.5" mandrel-bent aluminum cold charge pipe (rear section)
• Heavy-duty 5-ply polyester reinforced silicone couplings
• Stainless-steel, spring-loaded T-Bolt clamps
• Installation hardware and instructions

Ideal For

This aFe Cold Charge Pipe is perfect for RAM 2500 and 3500 owners who want to improve their truck’s performance and reliability. It is especially suited for those who tow heavy loads, participate in off-road activities, or seek to enhance their diesel engine’s efficiency and power output. It also serves as a solid foundation for further performance upgrades such as intake systems, exhaust modifications, and tuning.

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.