aFe Large Bore-HD Exhaust System

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

Part #: 49-42006-B

Overview

The aFe Large Bore-HD 4" 409 Stainless Steel DPF-Back Exhaust System is engineered specifically for 2007.5 to 2012 Dodge and RAM 2500/3500 trucks equipped with the 6.7L Cummins engine. Designed to enhance both performance and sound, this exhaust system delivers a significant 22% increase in exhaust flow compared to stock setups. It is an ideal upgrade for diesel truck enthusiasts seeking improved horsepower, torque, and a more aggressive exhaust note without sacrificing durability or fitment.

Built to withstand the rigors of heavy-duty use, this DPF-back system maintains factory mounting points for a seamless, bolt-on installation. It is perfect for owners who want to maximize their truck’s potential while retaining a clean, professional appearance.

Key Features

This exhaust system combines advanced engineering with premium materials to deliver reliable performance gains and long-lasting durability. Key features include:

• 22% increase in exhaust flow for enhanced engine efficiency and power
• 100% hand MIG-welded construction ensuring strong, leak-free joints
• Mandrel-bent 4" 409 stainless steel tubing for smooth airflow and corrosion resistance
• 5" diameter polished stainless steel slash-cut exhaust tip with intercooling vents to reduce exhaust gas temperatures (EGTs)
• Laser-cut aFe POWER badges riveted on the exhaust tip for a distinctive look
• Utilizes factory mounting locations for a hassle-free, stable installation
• High-quality OE-style band clamps providing a complete 360-degree sealing surface
• Designed to lower EGTs, improving engine longevity and performance under load

Construction & Design

The aFe Large Bore-HD exhaust system is crafted from premium 409 stainless steel tubing, known for its excellent strength and corrosion resistance in demanding environments. Each section is mandrel bent to maintain consistent diameter and smooth bends, minimizing turbulence and maximizing exhaust flow. The entire system is hand MIG-welded by skilled technicians to ensure precise, durable welds that withstand thermal expansion and vibration.

The 5" polished stainless steel exhaust tip features intercooling vents that help dissipate heat at the tailpipe, effectively reducing exhaust gas temperatures. This design not only protects downstream components but also enhances the visual appeal of the truck’s rear end with a sleek, professional finish.

Performance & Sound

By increasing exhaust flow by 22%, this DPF-back system reduces backpressure, allowing the 6.7L Cummins engine to breathe more freely. The smooth mandrel bends and large diameter tubing promote efficient scavenging of exhaust gases, which can translate into improved horsepower and torque. Additionally, the reduction in exhaust gas temperatures helps maintain optimal engine operating conditions during heavy towing or hauling.

The exhaust note is noticeably deeper and more aggressive than stock, providing a commanding presence without excessive drone. This balance makes it suitable for daily driving as well as performance applications.

Installation & Fitment

The system is designed to fit 2007.5 through 2012 Dodge and RAM 2500/3500 trucks with the 6.7L Cummins engine using factory mounting locations. This ensures a straightforward, bolt-on installation with no modifications required. Included high-quality OE-style band clamps provide a secure, leak-free seal around all joints, making the installation process quick and hassle-free for professional installers and experienced DIYers alike.

What's Included

• 4" mandrel-bent 409 stainless steel DPF-back exhaust tubing
• 5" polished stainless steel slash-cut exhaust tip with intercooling vents
• High-quality OE-style band clamps for all connections
• Laser-cut aFe POWER badges 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. It is especially suited for those who tow or haul heavy loads regularly and need a reliable exhaust upgrade that reduces exhaust gas temperatures and enhances power without complicated installation or modifications.

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.