aFe Large Bore-HD Exhaust System

2007.5–2012 Dodge / RAM 2500/3500 6.7L Cummins

Part #: 49-42006

Overview

The aFe Large Bore-HD 4" 409 Stainless Steel DPF-Back Exhaust System is engineered specifically for Dodge and RAM 2500/3500 trucks equipped with the 6.7L Cummins engine from 2007.5 to 2012. Designed to excel in demanding environments, this exhaust system enhances your truck’s performance by improving exhaust flow, increasing horsepower and torque, and reducing exhaust gas temperatures (EGTs). It is an ideal upgrade for diesel enthusiasts seeking a durable, high-quality exhaust that delivers both power and a commanding sound without sacrificing reliability.

Built to fit seamlessly using factory mounting points, this system ensures a hassle-free installation experience while maintaining the stability and durability expected from an OE-style exhaust. Whether you’re towing heavy loads, working in tough conditions, or simply want to maximize your truck’s potential, the aFe Large Bore-HD exhaust system is engineered to meet your needs.

Key Features

This exhaust system combines advanced engineering with premium materials to deliver superior performance and longevity. Key features include:

• Mandrel bent 4-inch 409 stainless steel tubing for optimal exhaust flow and durability
• DPF-back design that replaces the factory exhaust from the diesel particulate filter rearward
• Factory mounting locations for a secure, direct-fit 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 deep, powerful exhaust note
• OE-style bayonet hangers that maintain stable pipe positioning under high vibration and heat
• 6-inch polished stainless steel exhaust tip for a clean, aggressive appearance
• Engineered to reduce exhaust gas temperatures, helping protect engine components and improve efficiency

Construction & Design

The aFe Large Bore-HD exhaust system is constructed from premium 409 stainless steel tubing, known for its excellent corrosion resistance and strength under extreme conditions. The tubing is mandrel bent to maintain a consistent diameter throughout bends, ensuring unrestricted exhaust flow and minimizing backpressure. This design enhances engine efficiency and power output.

All flanges and clamps are manufactured to OE specifications, providing a tight, leak-free seal and long-lasting durability. The system’s bayonet-style hangers replicate factory mounting points, securing the exhaust in place even under high heat and vibration, preventing sagging or misalignment over time.

Performance & Sound

This exhaust system is engineered to unlock the full potential of your 6.7L Cummins engine by improving exhaust flow and reducing backpressure. The result is increased horsepower and torque, along with lower exhaust gas temperatures that help maintain engine health during heavy-duty operation. The 24-inch muffler is specifically designed to absorb sharp, high-frequency tones, delivering a deep, aggressive exhaust note that enhances your truck’s presence without excessive drone.

Installation & Fitment

The aFe Large Bore-HD exhaust system is designed for a direct bolt-on installation using all factory mounting points, eliminating the need for cutting, welding, or additional modifications. The OE-style flange and clamp system ensures a secure, leak-free fit. Installation can typically be completed with basic hand tools, making it accessible for professional installers and experienced DIY enthusiasts alike.

This system fits 2007.5 to 2012 Dodge and RAM 2500/3500 trucks equipped with the 6.7L Cummins engine, ensuring precise compatibility and optimal performance.

What's Included

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

Ideal For

This exhaust system is perfect for Dodge and RAM 2500/3500 owners with the 6.7L Cummins engine who demand enhanced performance, durability, and sound quality. It is especially suited for those who use their trucks for towing, hauling, off-road driving, or heavy-duty work and want a reliable exhaust upgrade that improves power and reduces engine stress.

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.