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Overall rating: 4.783784 / 5 from 37 reviews.
The Aeroturbine Resonated 4.0" In x 4.0" Out Muffler 4040XL is a compact stainless steel muffler designed for unrestricted airflow and quiet operation. Customers appreciate its deep and mellow tone, great sound, and high-quality construction. The muffler uses louvered baffles to reduce exhaust gas temperatures and features 304 Stainless Steel Lap Joint Clamps for secure installation.
Review topics: ["looks","finish","exhaust","install","support","sounds","drone","tone","muffler","volume","resonator","truck","pipe"].
"Truck sounds like stock inside and no drone in the cabin. However it’s loud outside If you hit the gas and pass 2000rpms you can really hear it. So it’s a combination of quiet every day driving confort with a sporty sound when you need it. 2020 ram 2500 6. 7 diesel"
"Just installed today 6. 7 powerstroke definitely recommend this muffler easy install and has nice tone not much louder then stock and quiets the turbo noise way down has some drone at highway speeds but still quiet in cab. Has a nice rumble at idle"
"Sweet"
"The 4040XL adds a deep tone and great sound without being obnoxious. Will use on other rigs in the future! I haven't hand calculated it, but it seems like a little bump in MPG too."
"The old man was complaining of drone in his 4” straight piped 2015 duramax. Ordered this and installed it before the axle and it took all of the drone out! He can now cruise at any highway speed without any drone in the cab! Best Father’s Day gift I’ve ever got him!"
"First, this thing looks great! Second, WOW. I figured this would meet expectations but it surpassed them. I straight piped my 6. 7 and was unhappy with the pedal response and I needed to add a little backpressure. I read reviews on 4040xl and pulled the trigger. Its a perfect mixture creating just enough backpressure to enhanced pedal/acceleration feel and even enhances the sound outside the truck. Couldn't be more happy with it, and highly recommend. Again. . . Great Job!"
"Works great to calm the drone on the interstate and the extremely loud jet sound when truck was cold that would wake the whole neighborhood. Still sounds really good when driving and getting on the pedal. Wife and kids are definitely happy. I am as well. Perfect for a straight pipe 6. 7."
"Fit great, quality built, and it helped a lot on sound inside the cab in my 15 Ram 6. 7 cummins."
"Volume is much better in cab . I should have called xtreme diesle before I changed exhaust system"
"Great looking muffler but not the sound. . was not what I expected . . contacted Cory with sales and he was very helpful🤢can not express my sarcasm . . reached out to see if I can return , exchange or something to reorder a different muffler but pretty much what I got it is what it is . . S. O. L. ——lol 👍👍"
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