DynomaxUltra Flo 17221 Exhaust Muffler for Ford F-250 Super Duty

These mufflers sound mean on my 64 Dodge Max Wedge.

it brings the crazy sound to a rumble.

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.

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.

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.

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.

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.

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.