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USD 118.26
Part #: AEAT4040

Aero Exhaust AT4040 Aero-Turbine Performance Muffler

Universal - 4" Inlet/Outlet x 20" Length
Part #: AEAT4040
★★★★★ ★★★★★ 1 Reviews
$ $118.26
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The Aero Exhaust AT4040 Aero-Turbine Performance Muffler will give your truck a deeper, more aggressive exhaust sound. Designed for high-output diesel engines, the Aero-Turbine Performance Mufflers feature a patented airfoil technology that increases horsepower, torque, flow and also reduces temperatures. The AT4040 is the only performance muffler that will give you the performance of a full system at a fraction of the cost. 

Most vehicles have extreme restrictions on exhaust airflow, which increases exhaust temperatures and decreases engine longevity. The Aero-Turbine breakthrough, based on thermodynamics and jet engine technology, literally accelerates the flow of exhaust away from the engine increasing performance and engine efficiency.

Features & Benefits:

  • Reduced Temperatures 
  • Increased Horsepower 
  • Increased Torque 
  • Increased Fuel Economy 
  • T304 Stainless Steel Construction


  • Loud Tone
  • 4" Inlet/Outlet 
  • 20" Overall Length 
  • 6" Outside Diameter
  • Center Inlet, Center Outlet


  • MFG. Number AT4040
  • Manufacturer Name Aero Exhaust
  • Shipping Weight 8.00 lb.
  • Shipping Length 10 in.
  • Shipping Width 35 in.
  • Shipping Height 12 in.
  • Fuel Type Diesel / Gas
  • Warranty Yes
  • Warranty Info Manufacturers Lifetime
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
5.0/5 Stars out of 1 Reviews
US Army
Clyde (North Pole, AK) | June 17th, 2011
I installed one of these on my truck. It takes the edge off of the straight pipe raspy drone. It gives the truck a nice deep tone, but it is still pretty loud. This is not a quiet muffler.

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Questions and Answers

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Most Popular Questions

Is this a weld on muffler or can it be installed with clamps?
View Staff Answer 
This muffler can either be welded or clamped on.
Will this muffler also help reduce in cab drone that I get from Having a straight pipe system
View Staff Answer 
A muffler will help reduce in-cab drone but a general rule of thumb is that the longer the muffler, the better job it does at reducing those harsh tones in the exhaust.