Aero Exhaust Non-Resonated Turbine Performance Muffler AT4040

In Stock
Part #: AT4040
Now $144.99
Fast Free Ground Shipping
Shop all Aero Exhaust Mufflers
ADD TO CART ($144.99)

Customer Reviews

(4 reviews)

You must be logged in
to write a review

Login / Register Write a review
Read All Aero Exhaust Mufflers Reviews

Installation Instructions

Aero Exhaust Mufflers AT4040 Details

From the Aero Exhaust Turbine Series comes the AT4040 Diesel Exhaust Muffler. The original Aero Exhaust Muffler design, the AT4040 can be used on both diesel trucks and high-output gas engines with 4” piping. Used on the racecar circuit and proven in both the 600HP Monte Carlos of NASCAR and the 800HP Sprint Car Races in Arizona, the AT4040 utilizes Aero’s patented Air Foil technology. Completely stainless steel — inside & out — Aero Exhaust Turbine Mufflers can use NOS without the risk of burn-out, true to their racing circuit heritage. The 4040 is still versatile enough to be used with every American made passenger diesel truck — regardless of it’s make, model or year — tested on virtually every Ford PowerStroke, Chevy/GMC Duramax and Dodge Cummins. The AT4040 is an excellent choice for any truck owner looking for performance & fuel economy increases.


  NOTE: The 3 1/2” exhaust pipe
standard on most diesel trucks
can easily be bumped up to 4” or
replaced with a full 4” exhaust
pipe system. Please measure
before buying
so you know
what modifications may be needed.
INLET    :4.00” i.d.
OUTLET :4.00" i.d.
WIDTH    :6.00”
HEIGHT :6.00"
LENGTH :20.00"
WEIGHT :7.5 lbs.


Like all Aero Exhaust Mufflers, the 4040 is manufactured using the highest quality welded 304 hand-polished stainless steel, inside and out. The 4040 has been successfully applied and tested on nearly every year, make and model of diesel truck on the market today. The AT4040’s length allows for dual in-line mufflers on diesel trucks as well, increasing flow & performance while reducing EGTs more than a single muffler system. No other muffler can make this claim – a true testament to the dramatic performance enhancements the Aero Exhaust AT4040 Muffler provides. The 3 1/2” exhaust pipe standard on most Diesel trucks can easily be bumped up to 4” or replaced with a full 4” exhaust pipe system. Please make sure to measure before buying so you know if modifications will be needed.


This product can expose you to chemicals which are known to the State of California to cause cancer. For more information go to
California Proposition 65 Notice
Verify Fitment

Don't see your vehicle? Browse similar parts.
free shipping icon
FREE Shipping On all orders over $100
Secure shopping icon
Safe Shopping Payments 100% secure
phone icon
Have a question? 1-801-938-4891