• aFe Large Bore-HD 4in 409 Stainless Steel Cat-Back Exhaust System w/o Tip
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aFe Large Bore-HD 4in 409 SS Cat-Back Exhaust | GM Silverado/Sierra 2500/3500 (01-05) (49-14001)

aFe Large Bore-HD 4in 409 SS Cat-Back Exhaust | GM Silverado/Sierra 2500/3500 (01-05) (49-14001)

49-14001

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$582.35 USD
$660.00 USD $582.35 USD
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The aFe Large Bore-HD 4-inch 409 stainless steel cat-back exhaust system is designed to enhance the performance and sound of GM Silverado and Sierra 2500/3500 models from 2001 to 2005. Constructed from mandrel-bent 409 stainless steel tubing, this system features a large 4-inch main diameter and a single side exit tailpipe, delivering increased exhaust flow for improved horsepower and torque. The aggressive and loud exhaust tone provides a more commanding sound profile, while the design reduces exhaust gas temperatures for better engine efficiency. Each system is dyno-tested by aFe to ensure maximum performance gains, making it a high-quality upgrade for enthusiasts seeking durability and enhanced sound.

This cat-back exhaust is a direct bolt-on replacement for the factory system on applicable GM trucks within the specified years and models. It is intended for use on vehicles equipped with the 6.0L or 8.1L engines, suitable for street and performance driving. The kit includes the main exhaust components with a tailpipe, designed for straightforward installation without modifications. Ideal for those looking to increase power, improve sound, and upgrade their truck’s exhaust system, this aFe system offers a durable, performance-oriented solution for daily drivers and enthusiasts alike.

Overview

Large Bore HD 409 SS Cat-Back Exhaust System with Single Side Exit (49-14001) by aFe. With Tailpipe. Exhaust System Type: Cat-Back. Exhaust Tubing Material: 409 SS. Main Tubing Diameter: 4". Exhaust System Sound: Aggressive / Loud. Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Large Bore HD Cat-Back Exhaust System. aFe dyno tests every system for maximum gains, and constructs them from mandrel-bent stainless steel for maximum flow and long-lasting durability.

A performance exhaust system is one of the most common ways of improving a vehicle's operation. The theory is simple; just reduce restriction to increase exhaust flow and you gain power. But all exhaust systems are not created equal; in reality there's more to it than just selling some sewer pipe sized tubes.

aFe tests its systems on the flow bench and the dynamometer to determine the right pipe size and muffler construction. Then they mandrel bend the pipes to ensure they maintain their shape and size throughout the entire length, to provide smooth, unrestricted airflow. Tubes that are not mandrel bent can lose up to 20% of their diameter in sharp bends. An 8" diameter by 30" length, straight, flow-through, perforated muffler is included in the system. A straight muffler delete pipe is also included if a more aggressive sound and maximum flow is desired. This system will increase exhaust flow by up to 29% and lower EGT (Exhaust Gas Temperature) by up to 100 , with a corresponding improvement in power and performance.

But performance is only part of the equation. A quality exhaust system should be easy to install and made to last. The muffler and all pipes of the Large Bore HD system are constructed from durable 409 stainless steel. To ensure a tight seal, slotted and swedged ends are used whenever possible. When used with the supplied premium quality band clamps, the tightest, leak-free seal is the result. Every hanger is thoroughly welded on each side to ensure a strong attachment and the hangers also feature swaged bayonet ends to lock in place once installed. The factory mounting locations are used throughout and a 2-piece tailpipe facilitates adjustment.

Every system comes with clamps, hangers and detailed instructions to guide you through the installation. The Large Bore HD Exhaust System is made in USA.

aFe (Advanced Flow Engineering, Inc.) manufactures performance products for late model cars, light trucks and SUVs. The company was founded in 1999 with an initial concentration on high performance air filters. Since then, the company product line has broadened to include cold air intakes, fluid filters, exhaust systems, intake manifolds, intercoolers, programmers, differential covers, transmission pans and throttle body spacers. The team of engineers, machinists, production and sales people at aFe have many years of experience in their respective positions, and together work to ensure they produce the best automotive products on the market.

Features:

  • 4 in. Mandrel Bent 409 Stainless Steel Tubing
  • Maximum Flow
  • High Flow Muffler
  • Lower EGTs
  • Bayonet Style Hangers For Easy Installation
  • Increased Horsepower And Torque
  • 2 Year Limited Warranty
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