aFe Large Bore-HD Exhaust System

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

Part #: 49-42006-P

Overview

The aFe Large Bore-HD 4" 409 Stainless Steel DPF-Back Exhaust System is engineered specifically for the 2007.5 to 2012 Dodge and RAM 2500/3500 trucks equipped with the 6.7L Cummins engine. Designed to enhance exhaust flow and improve overall engine performance, this exhaust system delivers a noticeable increase in power and a deeper, more aggressive sound. Ideal for diesel enthusiasts seeking a durable, high-quality upgrade that maintains factory fitment and ease of installation.

By replacing the restrictive factory DPF-back exhaust, this system unlocks your truck’s potential with a 22% increase in exhaust flow, helping to reduce exhaust gas temperatures (EGTs) and improve turbo efficiency. It’s a perfect balance of performance, durability, and style for serious Cummins owners.

Key Features

Crafted with precision and durability in mind, the aFe Large Bore-HD Exhaust System offers the following standout features:

• 100% hand MIG-welded construction for superior strength and leak-free joints
• Mandrel-bent 4" 409 stainless steel tubing to maximize exhaust flow and minimize turbulence
• 5" diameter polished stainless steel slash-cut exhaust tip with intercooling vents to reduce tailpipe EGTs
• Laser-cut aFe POWER badges riveted on the exhaust tip for a premium appearance
• Utilizes factory mounting locations for a secure, hassle-free installation
• Includes high-quality OE-style band clamps providing a complete 360-degree sealing surface
• Designed to improve horsepower and torque while lowering exhaust gas temperatures
• Durable 409 stainless steel resists corrosion and withstands harsh diesel exhaust conditions

Construction & Design

This exhaust system is built from 100% 409 stainless steel tubing, known for its excellent strength and corrosion resistance, making it ideal for heavy-duty diesel applications. Each section is mandrel bent to maintain consistent diameter and smooth flow, reducing backpressure and turbulence throughout the exhaust path. The hand MIG-welded joints ensure a robust, leak-free seal that stands up to the rigors of daily driving and heavy towing.

The polished 5" exhaust tip is not only visually striking but also features intercooling vents designed to lower exhaust gas temperatures at the tailpipe, helping to protect downstream components and improve overall system efficiency. The laser-cut aFe POWER plates add a touch of craftsmanship and brand authenticity.

Performance & Sound

By increasing exhaust flow by up to 22%, this DPF-back system enhances turbo spool and reduces exhaust gas temperatures, which can contribute to improved engine responsiveness and longevity. The smooth mandrel bends and larger diameter tubing reduce restrictions, allowing your Cummins engine to breathe more freely and produce more power and torque.

The exhaust note is deeper and more aggressive without being overly loud or droning, providing a satisfying sound that complements the truck’s performance upgrades while maintaining daily drivability.

Installation & Fitment

The aFe Large Bore-HD Exhaust System is designed to bolt directly onto the factory mounting points of 2007.5–2012 Dodge and RAM 2500/3500 trucks with the 6.7L Cummins engine. This ensures a secure fit and eliminates the need for cutting, welding, or modifications. The included OE-style band clamps provide a tight, 360-degree seal for leak-free operation.

Installation is straightforward and can typically be completed with basic hand tools, making it accessible for experienced DIYers or professional installers alike.

What's Included

• 4" mandrel-bent 409 stainless steel DPF-back exhaust piping
• 5" polished stainless steel slash-cut exhaust tip with intercooling vents
• High-quality OE-style band clamps for secure sealing
• Laser-cut aFe POWER badge riveted on exhaust tip
• All necessary hardware for installation

Ideal For

This exhaust system is ideal for Dodge and RAM 2500/3500 owners with the 6.7L Cummins engine who want to improve their truck’s performance, sound, and durability without sacrificing factory fitment or requiring complex installation. It suits daily drivers, towing enthusiasts, and diesel performance aficionados looking for a reliable upgrade that enhances exhaust flow and reduces exhaust gas temperatures.