aFe Large Bore-HD Exhaust System

2007.5–2012 RAM 2500/3500 6.7L

Part #: 49-42016-P

Overview

The aFe Large Bore-HD 5" 409 Stainless Steel DPF-Back Exhaust System with Polished Tip 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, increasing horsepower and torque, and reducing exhaust gas temperatures (EGTs). It is an ideal upgrade for diesel truck owners seeking a durable, high-performance exhaust that maintains factory fitment and reliability.

Built to withstand extreme environments, this system offers a balance of aggressive sound and robust construction, making it perfect for both work and recreational use. Whether you’re towing heavy loads or looking to maximize your truck’s power output, the aFe Large Bore-HD exhaust delivers measurable improvements without compromising OEM quality.

Key Features

This exhaust system incorporates advanced engineering and premium materials to ensure top-tier performance and durability. Key features include:

• Mandrel bent 4-inch 409 stainless steel tubing for maximum exhaust flow and strength
• DPF-back design that retains factory mounting points for easy, bolt-on installation
• High-quality OE-style flange and band clamps providing a complete 360-degree sealing surface
• Free-flowing 24-inch long muffler engineered to absorb high-pitched tones and produce a powerful exhaust note
• OE-style bayonet hangers that maintain pipe stability under high vibration and heat conditions
• Polished stainless steel tip for a clean, professional appearance
• Designed to lower exhaust gas temperatures, enhancing engine efficiency and longevity

Construction & Design

The aFe Large Bore-HD exhaust system is constructed from mandrel bent 409 stainless steel tubing, known for its excellent corrosion resistance and durability in harsh environments. The 4-inch tubing diameter optimizes exhaust flow, reducing backpressure and improving engine breathing. The system uses OE-style flanges and clamps to ensure a secure, leak-free connection throughout the exhaust path.

Special attention is given to the mounting hardware and hangers, utilizing OE-style bayonet hangers that securely hold the exhaust in place even under the high vibration and heat typical of heavy-duty diesel applications. The polished stainless steel tip not only enhances the visual appeal but also resists discoloration and corrosion over time.

Performance & Sound

This exhaust system is designed to unleash the full potential of your 6.7L Cummins engine by increasing horsepower and torque through improved exhaust flow. The free-flowing muffler reduces restrictive backpressure while absorbing unwanted high-frequency tones, resulting in a deep, aggressive exhaust sound that commands attention without excessive drone. Additionally, the system helps lower exhaust gas temperatures, which can contribute to improved engine efficiency and durability during heavy towing or extended operation.

Installation & Fitment

The aFe Large Bore-HD exhaust system is engineered for a direct bolt-on installation using all factory mounting locations. This ensures a hassle-free fitment process with no need for cutting, welding, or modifications. The system is designed specifically for 2007.5 to 2012 RAM 2500 and 3500 trucks equipped with the 6.7L engine, guaranteeing precise compatibility and a secure fit that maintains factory ground clearance and alignment.

What's Included

• Mandrel bent 4-inch 409 stainless steel DPF-back exhaust piping
• Free-flowing 24-inch muffler
• Polished stainless steel exhaust tip
• OE-style flange and band clamps
• OE-style bayonet hangers and mounting hardware

Ideal For

• RAM 2500/3500 owners seeking improved power and torque from their 6.7L diesel
• Diesel truck enthusiasts wanting a durable, high-quality exhaust upgrade with a refined sound
• Operators who require a reliable exhaust system capable of withstanding heavy-duty towing and off-road conditions
• Those looking for a direct-fit exhaust solution that maintains factory mounting points 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.