aFe Large Bore-HD Performance Exhaust

2013–2018 RAM 2500 / 3500 6.7L Crew Cab

Part #: 49-42051-1B

Overview

The aFe Large Bore-HD 5" 409 Stainless Steel DPF-Back Exhaust with Black Tip is engineered specifically for the 2013–2018 RAM 2500 and 3500 models equipped with the 6.7L Cummins engine and Crew Cab configuration. Designed to replace the factory exhaust from the Diesel Particulate Filter (DPF) back, this system enhances exhaust flow while maintaining a clean, aggressive appearance. It is ideal for truck owners seeking improved performance, durability, and a refined exhaust tone without compromising reliability or fitment.

This exhaust system is perfect for enthusiasts and professionals who demand a robust upgrade that supports heavy-duty use and towing, while also delivering a noticeable improvement in throttle response and engine efficiency.

Key Features

The Large Bore-HD exhaust system incorporates advanced design elements and quality materials to ensure superior performance and longevity. Key features include:

• 5-inch diameter 409 stainless steel tubing for increased exhaust flow and durability
• DPF-back design that replaces the exhaust from the Diesel Particulate Filter rearward
• Smooth mandrel bends to minimize turbulence and restriction
• OE-style band clamps and bayonet-style hangers for a secure, factory-like fit
• Black powder-coated stainless steel tip for corrosion resistance and a sleek finish
• Designed specifically for 2013–2018 RAM 2500/3500 6.7L Crew Cab models ensuring precise fitment
• Corrosion-resistant 409 stainless steel construction for long-lasting performance
• Improved exhaust gas evacuation to support engine efficiency and potential power gains

Construction & Design

The aFe Large Bore-HD exhaust system is crafted from premium 409 stainless steel, known for its excellent corrosion resistance and strength under high-heat conditions. The 5-inch tubing diameter is larger than stock, allowing exhaust gases to flow more freely, reducing backpressure and improving engine breathing. Smooth mandrel bends maintain consistent diameter throughout the system, preventing flow restrictions that can hinder performance.

Installation hardware includes OE-style band clamps and bayonet-style hangers, which provide a secure and vibration-free mounting solution. The black powder-coated tip not only enhances the visual appeal but also protects against rust and environmental damage, ensuring the system maintains its appearance over time.

Installation & Fitment

This exhaust system is designed for a direct bolt-on installation from the DPF back on 2013–2018 RAM 2500 and 3500 trucks with the 6.7L Cummins engine and Crew Cab configuration. The OE-style band clamps and bayonet hangers allow for a clean, straightforward installation without the need for cutting or welding. This ensures a professional fit and finish that aligns with factory mounting points, reducing installation time and complexity.

What's Included

• 5" 409 stainless steel DPF-back exhaust system
• Black powder-coated stainless steel exhaust tip
• OE-style band clamps
• Bayonet-style hangers
• Installation hardware and instructions

Ideal For

This exhaust system is ideal for RAM 2500 and 3500 owners who want to upgrade their factory exhaust for improved flow, durability, and sound without sacrificing fitment or requiring extensive modifications. It suits daily drivers, towing enthusiasts, and performance-minded owners who demand a reliable and efficient exhaust solution tailored to the 6.7L Cummins engine in Crew Cab trucks from 2013 to 2018.

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.