aFe LARGE BORE HD Exhaust System

2019–2026 Ram 2500 / 3500 6.7L Diesel

Part #: 49-42078-P

Overview

The aFe LARGE BORE HD 5-inch 409-SS DPF-Back Exhaust with Polished Tip is engineered specifically for 2019–2026 Ram 2500 and 3500 trucks equipped with the 6.7L diesel engine. Designed to replace the factory diesel particulate filter (DPF) back section, this exhaust system enhances exhaust flow while maintaining durability and a refined appearance. Ideal for diesel truck owners seeking improved performance, a robust sound, and a high-quality upgrade, this exhaust delivers a balance of power and style without compromising reliability.

Built to withstand the rigors of heavy-duty use, the aFe LARGE BORE HD exhaust is perfect for enthusiasts who demand more from their diesel trucks, whether for towing, hauling, or daily driving. It offers a straightforward bolt-on installation that integrates seamlessly with the factory components.

Key Features

This exhaust system incorporates advanced design and materials to provide lasting performance benefits. Key features include:

• 5-inch large bore tubing for increased exhaust flow and reduced backpressure
• Constructed from durable 409 stainless steel for corrosion resistance and longevity
• DPF-back design that replaces the factory exhaust section downstream of the diesel particulate filter
• Polished stainless steel exhaust tip for a clean, aggressive appearance
• Precision mandrel bends to maintain smooth exhaust flow and maximize performance
• Direct bolt-on fitment with factory mounting points for hassle-free installation
• Engineered specifically for Ram 2500 and 3500 trucks with the 6.7L Power Stroke diesel engine
• Enhances exhaust sound with a deep, refined tone without excessive drone

Construction & Design

The aFe LARGE BORE HD exhaust system is crafted from premium 409 stainless steel, chosen for its excellent resistance to rust and corrosion in demanding environments. The 5-inch tubing diameter is optimized to improve exhaust gas evacuation, reducing engine strain and supporting better performance. Mandrel bending techniques ensure smooth curves that prevent flow restrictions, maintaining consistent exhaust velocity throughout the system.

The polished stainless steel tip adds a touch of style while resisting discoloration from heat and road elements. Every component is engineered to meet or exceed OEM standards, ensuring a durable and reliable upgrade that complements the rugged nature of Ram diesel trucks.

Installation & Fitment

This exhaust system is designed for a direct bolt-on installation on 2019–2026 Ram 2500 and 3500 models equipped with the 6.7L diesel engine. It replaces the factory DPF-back section without requiring modifications to the vehicle’s existing exhaust layout. Installation can typically be completed with basic hand tools and does not require cutting or welding, making it accessible for professional installers and experienced DIY enthusiasts alike.

All mounting hardware and gaskets are included to ensure a secure and leak-free fit. The system maintains compatibility with factory sensors and emissions equipment, preserving vehicle functionality and reliability.

What's Included

• 5-inch 409 stainless steel DPF-back exhaust section
• Polished stainless steel exhaust tip
• All necessary mounting hardware and gaskets
• Installation instructions

Ideal For

This exhaust system is ideal for Ram 2500 and 3500 diesel truck owners who want to enhance their vehicle’s exhaust flow and sound without compromising durability or requiring extensive modifications. It suits drivers who tow heavy loads, haul cargo, or simply desire a more aggressive exhaust note and improved throttle response. The aFe LARGE BORE HD exhaust is also a great choice for enthusiasts looking to upgrade their truck’s appearance with a polished tip and high-quality stainless steel construction.

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.