aFe Diesel Fuel System

2011–2012 Ram 2500/3500 6.7L Diesel

Part #: 42-12033

Overview

The aFe POWER DFS780 Diesel Fuel System is engineered specifically for 2011–2012 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine. Designed to address common fuel contamination issues, this advanced system effectively removes harmful debris such as dirt, water, and air from your diesel fuel. By ensuring cleaner fuel delivery, it protects your injectors from damage and helps maintain optimal engine performance.

Ideal for diesel truck owners seeking improved reliability and power, the DFS780 also enhances fuel pressure stability. This ensures consistent fuel availability to the high-pressure pump, resulting in better throttle response and increased horsepower across all RPM ranges.

Key Features

The aFe DFS780 Diesel Fuel System incorporates innovative technology to optimize your diesel engine’s fuel delivery. Key features include:

• Patent-pending design that removes air, water, and other contaminants from diesel fuel
• Boosts fuel pressure to maintain consistent flow to the high-pressure fuel pump
• Protects fuel injectors from premature wear and damage caused by debris
• Improves throttle response for more immediate engine reaction
• Enhances horsepower and overall engine performance at all RPM levels
• Direct fitment for 2011–2012 Ram 2500 and 3500 6.7L diesel trucks
• Durable construction designed to withstand harsh diesel fuel conditions

Construction & Design

The DFS780 is built with high-quality materials engineered to endure the demanding environment of diesel fuel systems. Its robust construction ensures long-lasting durability while maintaining precise fuel filtration and pressure regulation. The system’s design focuses on efficient removal of contaminants without restricting fuel flow, preserving engine efficiency and reliability.

Performance & Sound

By eliminating power-robbing contaminants and stabilizing fuel pressure, the aFe DFS780 Diesel Fuel System contributes to noticeable improvements in engine performance. Users can expect enhanced throttle response and smoother power delivery, which translates to better drivability and increased horsepower throughout the RPM range. While primarily focused on fuel system efficiency, these performance gains support a more responsive and capable diesel truck.

Installation & Fitment

The DFS780 is designed as a direct replacement for the factory fuel system components on 2011–2012 Ram 2500 and 3500 trucks with the 6.7L Cummins engine. Installation requires no major modifications and can typically be completed with basic hand tools. Clear instructions are provided to ensure a straightforward upgrade process, allowing owners to quickly benefit from improved fuel filtration and pressure management.

What's Included

• aFe POWER DFS780 Diesel Fuel System assembly
• All necessary mounting hardware and fittings
• Installation instructions

Ideal For

This diesel fuel system upgrade is ideal for Ram 2500 and 3500 owners who demand reliable power and longevity from their 6.7L Cummins engines. It is especially beneficial for those operating in environments where diesel fuel quality may be compromised by contaminants. Whether used for daily driving, towing, or heavy-duty work, the DFS780 helps maintain peak engine performance and protects critical fuel system components.

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.