aFe Large Bore-HD Cat-Back Exhaust System

2004–2007 Dodge Ram 2500 / Ram 3500

49-12002

Overview:

The aFe Large Bore-HD Cat-Back Exhaust System is engineered specifically for 2004 to 2007 Dodge Ram 2500 and Ram 3500 trucks, delivering a significant upgrade in exhaust flow and overall performance. Designed for enthusiasts seeking enhanced horsepower, torque, and a more aggressive exhaust note, this system replaces the restrictive factory exhaust with a high-flow, mandrel-bent aluminized steel setup. Whether you’re towing heavy loads or looking to maximize your truck’s power output, the Large Bore-HD system offers a durable and effective solution that improves engine efficiency and reduces exhaust gas temperatures.

Built to exacting standards, this cat-back exhaust system balances performance gains with a robust construction that ensures long-lasting reliability in demanding conditions. It is an ideal upgrade for those who want to unlock the full potential of their Dodge Ram’s powertrain without compromising on quality or fitment.

Key Features:

Every aspect of the aFe Large Bore-HD Cat-Back Exhaust System is designed to optimize exhaust flow and durability. Key features include:

• 4-inch mandrel-bent 409 stainless steel tubing for maximum flow and strength
• High-flow, straight-through perforated muffler measuring 8 inches in diameter and 30 inches in length
• Includes a straight muffler delete pipe for a more aggressive sound and maximum exhaust flow
• Single side exit design tailored for Dodge Ram 2500/3500 applications
• Bayonet-style hangers with swaged ends for secure, leak-free installation
• Slotted and swedged pipe ends to ensure tight seals with premium band clamps
• Engineered to increase exhaust flow by up to 29% and reduce exhaust gas temperatures by up to 100°F
• Durable aluminized steel construction resists corrosion and withstands harsh environments
• Comes with all necessary clamps, hangers, and detailed installation instructions
• Manufactured in the USA by aFe, a trusted name in performance automotive parts

Construction & Design:

The Large Bore-HD Cat-Back Exhaust System is crafted from premium 409 stainless steel tubing, chosen for its excellent corrosion resistance and durability under high-heat conditions. The tubing is mandrel bent to maintain a consistent 4-inch diameter throughout the entire length, preventing flow restrictions commonly caused by crushed or kinked bends. This precise bending technique ensures smooth, unrestricted exhaust gas flow, which is critical for maximizing engine performance.

The system’s muffler features a straight-through, perforated design that minimizes backpressure while delivering an aggressive exhaust tone. All hangers are fully welded and incorporate swaged bayonet ends, locking securely into factory mounting points for a hassle-free installation that maintains factory alignment and clearance. The use of slotted and swedged pipe ends combined with premium band clamps guarantees a tight, leak-free seal that stands up to vibration and thermal expansion.

Performance & Sound

By significantly increasing exhaust flow—up to 29% over stock—the aFe Large Bore-HD system helps your Dodge Ram’s engine breathe more efficiently. This results in improved horsepower and torque, as well as lower exhaust gas temperatures by as much as 100°F, which can contribute to better engine longevity and reliability under load. The included muffler delivers a bold, aggressive sound that enhances the driving experience without excessive drone, while the optional muffler delete pipe allows for an even louder, more race-inspired exhaust note for those who prefer maximum auditory impact.

Installation & Fitment:

This cat-back exhaust system is designed for direct bolt-on installation on 2004–2007 Dodge Ram 2500 and Ram 3500 trucks, requiring no cutting or welding. It utilizes all factory mounting points and includes detailed instructions, premium band clamps, and fully welded hangers to ensure a secure and leak-free fit. The two-piece tailpipe design allows for easy adjustment to achieve the perfect fit and alignment. Installation can typically be completed with basic hand tools and moderate mechanical experience.

What's Included:

• 4-inch mandrel-bent aluminized steel tubing
• 8" diameter x 30" length straight-through perforated muffler
• Straight muffler delete pipe for aggressive sound option
• Premium band clamps
• Fully welded bayonet-style hangers
• Detailed installation instructions

Ideal For:

The aFe Large Bore-HD Cat-Back Exhaust System is perfect for Dodge Ram 2500 and 3500 owners who demand enhanced performance, improved exhaust sound, and increased durability. It is especially suited for those who tow heavy loads, haul frequently, or simply want to upgrade their truck’s exhaust system for better throttle response and engine efficiency. Whether you’re a daily driver, weekend warrior, or work truck operator, this exhaust system delivers reliable gains and a commanding presence on the road.

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.