Dynomax or Flowmaster?

GTamas · Jul 23, 2024

What do you think, which one is quieter at idle and cruise speed? Which one should I get for my stock 94 convertible cruiser?
Dynomax Ultraflow, Dynomax Super Turbo or Flowmaster 50 DeltaFlow?
I am not concerned about performance. It's more important to have less drone and not be too loud/aggressive.

ttocs · Jul 23, 2024

my side exhaust is dynomaster and I am happy with the sounds with cats on the car. It was a little louder than I wanted with the off-road pipe on it.

96blak54 · Jul 23, 2024

Any turbo muffler I have ever heard has a mellow idle and a smooth running note.

badass98svt · Jul 23, 2024

I run Dynomax Ultraflow on my turbo Cobra. Best way to describe it is sedated at idle and cruising, but it has a real bark to it when you get on it. It's honestly my favorite exhaust setup I've ever had on any mustang.
Turbo cars have quieter exhaust, so your mileage may vary.

Wmac · Jul 23, 2024

Also running ultraflows (dumped). Agree with above and no drone.

lwarrior1016 · Jul 23, 2024

I don’t know how it would compare to stock volume, but I really like hooker max flow mufflers.

They’ve got a really quiet idle and no drone, noticeable note at wide open throttle

GTamas · Jul 24, 2024

Thanks guys, I have ordered two Ultra Flo welded mufflers.

GTamas · Jul 29, 2024

Got the mufflers installed today at a shop near me. Not a clean job, but for now it works and I'm gonna let it correctly aligned during the winter.
But more importantly, they sound very good!

I was surprised, volume-wise it is very close to the stock mufflers. The tone is also similar, a bit more throaty I think. Cruising there is no drone and volume is maybe a tad higher than the stock was, which is exactly what I was looking for.
I only had a chance to do a short WOT run in 1st gear, but it sounds great. Loud but not too much. I like it. Thanks for everyone for the recommendation!

I read somewhere that the volume might change over time when the packing deteriorates/settles some. Is it something noticeable?

GTamas · Jul 29, 2024

I'm not satisfied with the way they installed the mufflers, but I knew in advance they are not an exhaust specialist and don't have pipe bending equipment. Especially the driver's side muffler is not lined nicely, sacrificing some ground clearance, because the used the stock pipe segment which comes after the H-pipe connection. I will bring it to a specialist during the winter to properly install it with new pipes coming between the H-pipe and the mufflers.

badass98svt · Jul 29, 2024

Glad you like the sound. Yeah they should break in a bit. Nothing too drastic though.

Mustang5L5 · Aug 8, 2024

I think using the all-thread as an exhaust hanger would irritate me more.

GTamas · Aug 9, 2024

Mustang5L5 said:
I think using the all-thread as an exhaust hanger would irritate me more.

Yes, that's also not a nice solution.

ttocs · Aug 9, 2024

because of cost or is it hardened or brittle from the threading?

Mustang5L5 · Aug 9, 2024

Just not the right application.

I get it. It gets the job done and nobody will see it, but it would bug me.

ttocs · Aug 9, 2024

gotcha. I found some round stock at the local hardware store that was the right size to make mine out of but if I couldn't then allthread is something I would not think about, but might use if I did. Although now that I think about it as hard as it was to get them off the roundstock hangers last time if it was allthread I might have considered cutting them out. I was surprised how hard it was to get them to slide out.