• aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)
  • aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)
  • aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)
  • aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)
  • aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)
  • aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)
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aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)

aFe 4in SS Cat-Back Exhaust GM 2500/3500HD V8 6.6L L8T (20-21) (49-44123-B)

49-44123-B

In stock

$723.53 USD
$820.00 USD $723.53 USD
kADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The aFe 4-inch SS Cat-Back Exhaust for GM 2500/3500HD V8 6.6L L8T (20-21) is a high-performance axle-back exhaust system designed to enhance sound and exhaust flow. Featuring a single side exit configuration, this system is built with 3-inch mandrel-bent stainless steel tubing that ensures maximum flow and durability. The black exhaust tip, adorned with an aFe POWER badge, adds an aggressive aesthetic while resisting corrosion. This muffler delete system is engineered to improve exhaust efficiency, resulting in a more aggressive sound profile and potential performance gains. Constructed from MIG-welded stainless steel, it offers long-lasting reliability and a premium appearance.

Designed specifically for 2020-2021 GM 2500 and 3500HD trucks equipped with the V8 6.6L L8T engine, this system is a direct bolt-on replacement that requires no additional modifications. It is suitable for enthusiasts seeking a more aggressive exhaust note and improved exhaust flow for street or performance applications. The kit includes all necessary hardware and clamps for straightforward installation, making it an ideal upgrade for those looking to enhance their truck’s sound and performance. Suitable for daily driving or performance tuning, this exhaust system provides a durable, hassle-free upgrade.

Overview

aFe POWER introduces the all new Apollo GT Series single side exit axle-back exhaust system. This Apollo GT Series muffler delete is designed with a black exhaust tip with an aFe POWER badge for a unique, aggressive look. The tip is constructed from stainless steel for durability. The exhaust system is constructed from 3" MIG-welded, mandrel-bent stainless steel tubing for maximum flow. The performance muffler delete exhaust system includes all necessary hardware and clamps for a hassle-free install, with no cutting required, making it a true bolt on system.

Features:

  • Increases horsepower and torque
  • Improves performance
  • Lowers exhaust gas temperature
  • Flow bench and dyno tested
  • Welded hangers with swaged ends
  • Slotted and swedged ends
  • Premium quality band clamps
  • Backed by a 2-year limited warranty
  • Proudly made in the USA

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. Some systems also include a straight muffler delete pipe if a more aggressive sound and maximum flow is desired. A typical aFe system will increase exhaust flow by up to 29% and lower EGT (Exhaust Gas Temperature) by up to 100º, 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 Apollo GT 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.

DETAILS:

  • Constructed from 4" Mandrel-Bent 409 Stainless Steel Tubing
  • 5" Diameter Black 409 Stainless Steel Intercooled Clamp-On Exhaust Tip
  • Utilizes Factory Style Flange and Hangers for a Secure Fit
  • 100% MIG-Welded for Strength and Durability
  • All Necessary Hardware is Included for a Hassle-Free Installation
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