aFe Atlas Exhaust System

2013–2018 RAM 2500 / 3500 6.7L

Part #: 49-02039

Overview

The aFe Atlas 5" Aluminized Steel DPF-Back Exhaust is engineered specifically for the 2013 to 2018 RAM 2500 and 3500 models equipped with the 6.7L engine. Designed to replace the factory DPF-back section, this exhaust system offers a direct-fit solution that enhances your truck’s performance without compromising reliability or durability. Ideal for diesel enthusiasts seeking improved exhaust flow and reduced backpressure, the Atlas system delivers a balance of power gains, sound refinement, and ease of installation.

Built to meet the demands of heavy-duty applications, this exhaust system is perfect for RAM owners looking to upgrade their exhaust setup with a high-quality, factory-style replacement that maintains OEM mounting points and fitment.

Key Features

The aFe Atlas DPF-Back Exhaust combines thoughtful engineering with durable materials to provide a reliable upgrade for your RAM 2500/3500. Key features include:

• 5-inch mandrel-bent aluminized steel tubing for optimal exhaust flow and corrosion resistance
• Smooth transition bends designed to minimize turbulence and maximize horsepower and torque
• High-quality band clamps for secure, leak-free connections
• OE-style bayonet hangers that utilize all factory mounting locations for a hassle-free installation
• DPF-back design that replaces the section of exhaust downstream of the diesel particulate filter
• Engineered to lower exhaust gas temperatures (EGTs) for improved engine efficiency and longevity
• Manufactured in aFe’s Corona, California facility ensuring consistent quality and craftsmanship

Construction & Design

The Atlas exhaust system is constructed from 5-inch aluminized steel tubing, chosen for its excellent resistance to rust and corrosion in harsh environments. The mandrel-bent tubing maintains a consistent diameter throughout bends, preventing restrictions and promoting smooth exhaust gas flow. This design reduces backpressure and helps to improve engine performance and efficiency.

Attention to detail is evident in the use of OE-style bayonet hangers and premium band clamps, which ensure a secure fit and easy installation while maintaining factory mounting points. The aluminized steel finish provides long-lasting durability and a clean appearance without the higher cost of stainless steel.

Performance & Sound

The Atlas DPF-Back exhaust system is engineered to enhance your RAM’s performance by improving exhaust flow and reducing backpressure. This results in increased horsepower and torque, as well as lower exhaust gas temperatures, which can contribute to better engine health and efficiency over time. The smooth transition bends minimize turbulence, allowing the engine to breathe more freely.

While designed primarily for performance and durability, the exhaust also delivers a refined, aggressive tone that complements the robust character of the 6.7L Cummins diesel engine without being overly loud or intrusive.

Installation & Fitment

This exhaust system is a direct bolt-on replacement for the factory DPF-back section on 2013–2018 RAM 2500 and 3500 trucks with the 6.7L engine. It uses all original factory mounting points and hardware locations, allowing for a straightforward, hassle-free installation with no cutting, welding, or modifications required. The included high-quality band clamps ensure a tight, secure fit.

Installation can typically be completed with basic hand tools and does not require specialized equipment, making it accessible for both professional installers and experienced DIY enthusiasts.

What's Included

• 5" aluminized steel DPF-back exhaust section
• High-quality band clamps
• OE-style bayonet hangers
• Installation hardware and instructions

Ideal For

The aFe Atlas 5" Aluminized Steel DPF-Back Exhaust is ideal for RAM 2500 and 3500 owners who want a durable, performance-oriented exhaust upgrade that maintains factory fitment and ease of installation. It suits diesel truck enthusiasts looking to improve horsepower, torque, and exhaust sound without compromising reliability or requiring extensive modifications. This system is also a great choice for those seeking a cost-effective alternative to stainless steel exhausts while still benefiting from corrosion resistance and quality construction.

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.