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Your cart is empty.DynoMax® Ultra Flo™ Welded performance stainless steel mufflers feature 100-percent welded construction for lifelong durability. The unrestricted, straight-through design dyno proven to flow up to 2,000 SCFM and support up to 2,000 horsepower. Each muffler uses our exclusive Continuous Roving Fiberglass (CRF) Technology to absorb unwanted interior resonance while maintaining a deep performance tone. The 'Pure Unadulterated POWER' of DynoMax® Ultra Flo™ Welded mufflers are backed by a Limited Lifetime Warranty and exclusive 90-Day Performance & Sound Guarantee™.
JuneThompson
Reviewed in Canada on May 23, 2024
Has a deep rumble when accelerating then no cab noise until you reach cruising speed of120 kilometres an hour slight cab noise. Noise is not disturbing.
Brad
Reviewed in Canada on February 16, 2022
It works and sounds great!
matt lang
Reviewed in the United States on December 10, 2022
This is the 2nd Dynomax muffler I've bought. Extremely happy with the sound, got and performance of their products. Magnaflow like sound(imo) for a bargain price. Will continue to use their products.
Matthew Chavez
Reviewed in the United States on April 28, 2022
I purchased a pair of these Ultraflows (3") to replace my 2 chambered race mufflers on my 60's era muscle car. After driving around for a few days I had them removed and replaced with another pair of chambered mufflers. These ultraflows did reduce backpressure but lacked that classic muscle car cackle.
Joseph Cohen
Reviewed in the United States on April 12, 2022
Actually way quieter then I was expecting. I didn't go with a glasspack because I wanted to use my existing exhaust piping, and for that I needed an offset muffler. Super pleased with it on my 1989 Chevy G20 with a 350 in it. When you do give it gas it has a really deep pur to it.
Nicole
Reviewed in the United States on February 13, 2021
These are sweet, I have a 400 small block with a mild cam in a 63 Nova SS, they sound awesome, I had Hooker Areo Chambers the Drone was horrible these have no drone with side pipes, nice quality as well. I would totally recommend these for an older street car that you want a throaty sound without drone.
Norm
Reviewed in Canada on July 17, 2020
Love the sound and low pitch. Sounds like horsepower. Not noise
mgramz
Reviewed in the United States on September 16, 2019
Put this on my 2014 Sierra 1500 about 5 months ago. I deleted my resonator and clamped open my exhaust (flapper valve) and have the perfect sound. Great rumble and no issues, just pay a good welder $30 to put it on for your.. Sounds perfect.
Kelly Spahr White
Reviewed in the United States on October 8, 2018
This isn't my first Dynomax welded muffler, so I knew I was getting a good product. It's surprisingly quiet compared to the Flowmaster it replaced. The difference is HUGE on my TBI 350 K1500. Your results may vary.
M.A.P.
Reviewed in the United States on April 13, 2016
Great sound and great flowing muffler. Dynomax Ultraflows give you that great deep tone without the rasp. Interior drone was very minimal in my setup which included headers, no catalytic converters and a 3" single tailpipe.
chicagodiver
Reviewed in the United States on April 24, 2007
i purchased this muffler 4 years ago... it just rusted out. i guess for performance aspect it is great, it sounds deep and low and i love it.. however for a long drive on the high way the deep sounds gets very annoying, this must depend of the car u drive, i have a 90 AWD eclipse modded to have 300hp or so. if i did it again, i would have bought the super turbo because it is MUCH quieter.. its a 3 chamber design on the downside. For a daily driver, i would reconsider this muffler.
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