aFe Large Bore-HD Exhaust System

2013–2018 RAM 2500/3500 6.7L

Part #: 49-42039-B

Overview

The aFe Large Bore-HD 5" 409 Stainless Steel DPF-Back Exhaust with Black Tip is engineered specifically for the 2013 to 2018 RAM 2500 and 3500 models equipped with the 6.7L engine. Designed for diesel enthusiasts seeking enhanced performance and durability, this exhaust system delivers improved horsepower and torque while maintaining a robust and aggressive sound. Built to withstand extreme conditions, it offers a reliable upgrade that maximizes your truck’s potential without compromising factory fitment or ease of installation.

This exhaust is ideal for RAM owners who demand both power gains and a refined exhaust tone, making it a perfect choice for towing, hauling, or daily driving with enhanced efficiency and style.

Key Features

The aFe Large Bore-HD Exhaust system combines advanced engineering with premium materials to provide a superior exhaust upgrade. Key features include:

• Mandrel bent 4-inch 409 stainless steel tubing for maximum exhaust flow and durability
• 5-inch black stainless steel exhaust tip for a sleek, aggressive appearance
• DPF-back design that replaces the factory exhaust from the diesel particulate filter rearward
• Factory mounting locations ensure a secure, hassle-free installation without modifications
• High-quality OE style flange and band clamps providing a complete 360-degree sealing surface
• 24-inch free-flowing muffler designed to absorb high-pitched tones and produce a powerful, deep exhaust note
• OE style bayonet hangers maintain stable pipe positioning under high vibration and heat conditions
• Bayonet tip design holds hanger bushings firmly in place for a consistent OE-style fit over time

Construction & Design

This exhaust system is constructed from durable 409 stainless steel tubing, known for its excellent corrosion resistance and strength in demanding environments. The mandrel bending process ensures smooth, unrestricted airflow through the entire exhaust path, reducing backpressure and enhancing engine efficiency.

The system features a high-quality OE style flange and band clamps, delivering a reliable 360-degree seal that prevents leaks and maintains exhaust integrity. The 24-inch muffler is engineered to balance sound absorption with performance, eliminating harsh tones while allowing your engine’s power to be fully expressed.

Attention to detail is evident in the use of OE style bayonet hangers and tip design, which secure the exhaust firmly in place, preventing sagging or misalignment even under extreme heat and vibration common in heavy-duty applications.

Performance & Sound

The aFe Large Bore-HD exhaust system is designed to unlock additional horsepower and torque by improving exhaust flow and reducing exhaust gas temperatures (EGTs). This results in enhanced engine efficiency and responsiveness, particularly beneficial for heavy towing and demanding workloads.

Acoustically, the system delivers a deep, aggressive exhaust note that eliminates high-pitched drone, providing a commanding presence without overwhelming cabin noise. The free-flowing muffler design ensures a powerful sound that complements the performance gains.

Installation & Fitment

Installation is straightforward and utilizes all factory mounting points, ensuring a secure and precise fit without the need for cutting, welding, or additional modifications. The system is designed as a direct bolt-on replacement for the factory DPF-back exhaust on 2013–2018 RAM 2500 and 3500 models with the 6.7L engine, making it an ideal upgrade for owners seeking performance and reliability.

What's Included

• Mandrel bent 4-inch 409 stainless steel DPF-back exhaust piping
• 24-inch free-flowing muffler
• 5-inch black stainless steel exhaust tip
• OE style flange and band clamps
• OE style bayonet hangers and hardware
• Installation instructions

Ideal For

This exhaust system is perfect for RAM 2500 and 3500 owners who want to improve their truck’s performance, sound, and durability. It is especially suited for those who tow heavy loads, require reliable operation in harsh environments, or simply want a more aggressive exhaust tone without sacrificing factory fitment and ease of installation.

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.