aFe Large Bore-HD Exhaust System

2007.5–2012 RAM 2500/3500 6.7L

Part #: 49-42016-B

Overview

The aFe Large Bore-HD 5" 409 Stainless Steel DPF-Back Exhaust System is engineered specifically for the 2007.5 to 2012 RAM 2500 and 3500 equipped with the 6.7L engine. Designed to excel in demanding conditions, this exhaust system enhances your truck’s performance by improving exhaust flow and reducing backpressure. It is ideal for diesel truck owners seeking increased horsepower and torque while maintaining durability and a robust sound profile.

Built to integrate seamlessly with your vehicle, this system uses factory mounting points for a secure fit and straightforward installation. Whether you’re upgrading for towing, hauling, or everyday driving, the aFe Large Bore-HD exhaust system delivers reliable performance gains and a commanding exhaust note.

Key Features

This exhaust system combines advanced engineering with high-quality materials to provide a superior upgrade for your RAM 2500/3500 diesel truck:

• Mandrel bent 4-inch 409 stainless steel tubing for maximum exhaust flow and durability
• DPF-back design that maintains emissions compliance while enhancing performance
• Factory mounting locations ensure a hassle-free, stable installation
• High-quality OE-style flange and band clamps providing a 360-degree sealing surface
• Free-flowing 24-inch long muffler designed to absorb high-pitched tones and produce a powerful exhaust sound
• OE-style bayonet hangers maintain pipe stability under high vibration and heat conditions
• Black exhaust tip for a sleek, aggressive appearance

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 in high-temperature environments. The tubing is mandrel bent to preserve smooth exhaust flow, minimizing restrictions and turbulence. This design choice helps maximize horsepower and torque output while lowering exhaust gas temperatures (EGTs).

Attention to detail is evident in the use of OE-style flanges and band clamps, which create a secure, leak-free connection throughout the system. The bayonet hangers replicate factory mounting points, ensuring the exhaust remains firmly in place even under the rigors of heavy-duty use.

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, which translates to better towing capability and overall engine responsiveness. Additionally, the free-flowing muffler design reduces high-frequency drone, delivering a deep, aggressive exhaust tone that enhances your truck’s presence without being overpowering.

Installation & Fitment

The aFe Large Bore-HD exhaust system is designed for a direct bolt-on installation using all factory mounting locations, eliminating the need for cutting, welding, or modifications. This ensures a straightforward, hassle-free upgrade that maintains factory fitment and reliability. The system fits RAM 2500 and 3500 models from 2007.5 through 2012 equipped with the 6.7L Cummins engine.

What's Included

• Mandrel bent 4" 409 stainless steel tubing
• 24" free-flowing muffler
• OE-style flange and band clamps
• OE-style bayonet hangers with bushings
• Black exhaust tip
• Installation hardware and instructions

Ideal For

This exhaust system is perfect for RAM 2500 and 3500 owners who demand enhanced performance and durability from their diesel trucks. It suits enthusiasts looking to improve towing power, increase engine efficiency, and enjoy a more aggressive exhaust sound without sacrificing reliability or requiring complex installation. Whether used for work or recreation, the aFe Large Bore-HD exhaust system is a dependable upgrade for serious diesel truck drivers.

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.