aFe POWER DFS780 Diesel Fuel System

2013–2018 Ram 2500 / 3500 6.7L Diesel, 2015 Ram 3500 5.7L Hemi, 2015 Ram 3500 6.4L 392

Part #: 42-12036

Overview

The aFe POWER DFS780 Diesel Fuel System is engineered to optimize fuel delivery and protect your diesel engine from harmful contaminants. Designed specifically for select Ram 2500 and 3500 models equipped with 6.7L Cummins diesel engines as well as 2015 Ram 3500 5.7L Hemi and 6.4L 392 gas engines, this system addresses common fuel quality issues such as dirt, water, and air intrusion. By removing these power-robbing elements, the DFS780 helps maintain injector health, improve throttle response, and enhance overall engine performance.

Ideal for diesel truck owners seeking reliable power and longevity, this fuel system upgrade ensures your high-pressure fuel pump receives a consistent, clean fuel supply. The result is smoother operation and improved horsepower across all RPM ranges, making it a smart investment for both daily drivers and work trucks.

Key Features

The aFe POWER DFS780 Diesel Fuel System incorporates advanced technology to deliver superior fuel filtration and pressure management. Key features include:

• Patent-pending design that effectively removes air, water, and other contaminants from diesel fuel
• Enhanced fuel pressure regulation to ensure constant availability for the high-pressure fuel pump
• Improved throttle response and horsepower throughout the entire RPM range
• Protects diesel fuel injectors from damage caused by debris and moisture
• Compatible with 2013–2018 Ram 2500 and 3500 6.7L Diesel engines, plus select 2015 Ram 3500 5.7L Hemi and 6.4L 392 models
• Durable construction designed to withstand harsh diesel fuel conditions
• Easy integration with existing fuel system components

Construction & Design

The DFS780 is crafted with high-quality materials engineered for durability and reliability in demanding diesel applications. Its robust housing and internal components are designed to resist corrosion and degradation caused by contaminants commonly found in diesel fuel. The system’s patent-pending filtration technology efficiently separates air and water from the fuel stream, ensuring only clean fuel reaches the injectors and high-pressure pump. This thoughtful engineering extends the life of your fuel system components and maintains optimal engine performance.

Performance & Sound

By stabilizing fuel pressure and eliminating contaminants, the aFe DFS780 enhances engine responsiveness and power delivery. Drivers will notice improved throttle response and smoother acceleration, especially under load or during towing. While primarily focused on fuel system health and performance, this upgrade can contribute to a more refined engine operation without introducing additional noise or vibration.

Installation & Fitment

The aFe POWER DFS780 Diesel Fuel System is designed for direct fitment on compatible Ram 2500 and 3500 models from 2013 to 2018 with 6.7L diesel engines, as well as select 2015 Ram 3500 5.7L Hemi and 6.4L 392 engines. Installation typically requires no major modifications and can be completed with basic hand tools by a professional or experienced enthusiast. The system integrates seamlessly with the factory fuel lines and mounting points, ensuring a secure and reliable setup.

What's Included

• aFe POWER DFS780 Diesel Fuel System assembly
• All necessary mounting hardware and fittings for installation
• Detailed installation instructions

Ideal For

This diesel fuel system upgrade is ideal for Ram 2500 and 3500 owners who demand improved engine performance, reliability, and injector protection. It is especially beneficial for those who frequently tow, haul heavy loads, or operate in environments where fuel quality may be compromised. Whether you use your truck for work, recreation, or daily driving, the DFS780 helps maintain clean fuel delivery and consistent power output.

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.