aFe Large Bore-HD Exhaust System

2013–2018 RAM 2500 / 3500 6.7L Crew Cab

Part #: 49-42051-1P

Overview

The aFe Large Bore-HD 5" 409 Stainless Steel DPF-Back Exhaust with Polished Tip is engineered specifically for the 2013 to 2018 RAM 2500 and 3500 models equipped with the 6.7L engine and Crew Cab configuration. Designed to replace the restrictive factory exhaust system from the Diesel Particulate Filter (DPF) back, this performance exhaust enhances exhaust flow for improved efficiency and sound quality. Ideal for diesel truck enthusiasts seeking a durable, high-quality upgrade that maintains a clean, factory-like installation.

This exhaust system is perfect for drivers who want to reduce backpressure and improve throttle response without sacrificing reliability or fitment. Its polished stainless steel tip adds a refined appearance to the rear of the truck, complementing the rugged style of RAM heavy-duty pickups.

Key Features

The Large Bore-HD exhaust system combines advanced engineering with premium materials to deliver a reliable and effective upgrade. Key features include:

• 5-inch diameter tubing for increased exhaust flow and reduced restriction
• 409 stainless steel construction for excellent corrosion resistance and long-lasting durability
• DPF-back design that replaces the exhaust from the Diesel Particulate Filter rearward
• Polished stainless steel exhaust tip for a clean, factory-inspired finish
• OE-style band clamps and bayonet-style hangers for straightforward, secure installation
• Mandrel-bent tubing with smooth curves to maintain consistent exhaust velocity
• Designed specifically for 2013–2018 RAM 2500/3500 6.7L Crew Cab models ensuring perfect fitment

Construction & Design

The Large Bore-HD exhaust system is crafted from premium 409 stainless steel, known for its strength and resistance to rust and corrosion in harsh environments. The tubing features mandrel bends to preserve smooth exhaust flow without kinks or restrictions, which helps optimize engine efficiency. The system’s polished tip is precision-welded and finished to provide a sleek, durable appearance that resists discoloration from heat and road elements.

Attention to detail in the design includes OE-style band clamps and bayonet hangers that allow the exhaust to be installed cleanly and securely without the need for cutting or modification. This ensures a professional fit and finish that maintains the truck’s factory aesthetics.

Installation & Fitment

This aFe Large Bore-HD exhaust system is a direct-fit replacement designed for the 2013 through 2018 RAM 2500 and 3500 models with the 6.7L engine and Crew Cab configuration. Installation is straightforward and requires no cutting or welding, thanks to the OE-style band clamps and bayonet hangers. The system installs from the DPF back, making it a convenient upgrade that preserves factory mounting points and alignment.

Professional installation is recommended to ensure proper fitment and to avoid exhaust leaks, but experienced enthusiasts with basic tools can complete the upgrade in a reasonable timeframe.

What's Included

• 5" 409 stainless steel DPF-back exhaust tubing
• Polished 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 improve exhaust flow and sound quality while maintaining a clean, factory-style appearance. It suits diesel truck enthusiasts who use their vehicles for towing, hauling, or daily driving and desire a durable, high-performance exhaust upgrade that complements their truck’s powertrain and style.

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.