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Disappointed in super transverse muffler!!

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Old Dec 27, 2025 | 09:46 AM
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Disappointed in super transverse muffler!!

Hello,
Anyone running this super 10 transverse muffler, Part # 8425810 ? Thoughts? Flowmaster site.
I am disappointed with it on my 1990 L98. I do still have the cats, bu t man the muffler is quiet. I have a single in dual out super ten on my 2007 truck and i love it. Should I just get something else? Wait until I remove the cats (Not easy unless I do it my)? I really love that tinny exhaust I hear like it's a huge 50 gallon drum barrel.
Thanks.

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Old Dec 27, 2025 | 11:26 AM
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Re: Disappointed in super transverse muffler!!

That should be one of the loudest Flomaster chambered mufflers. Did you run the car w/no muff? With lame cams, crappy manifolds, cat...these cars aren't that loud even w/no muffler.
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Old Dec 27, 2025 | 12:44 PM
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Re: Disappointed in super transverse muffler!!

Originally Posted by Tom 400 CFI
That should be one of the loudest Flomaster chambered mufflers. Did you run the car w/no muff? With lame cams, crappy manifolds, cat...these cars aren't that loud even w/no muffler.
Pretty much. All stock, except muffler.
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Old Dec 27, 2025 | 01:03 PM
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Re: Disappointed in super transverse muffler!!

Originally Posted by Jlands
Pretty much. All stock, .
well there ya go.

No horsepower equals no sound.

that terrible flowmaster should be annoying loud to the next city..

You want louder? ugh... chekc out black widow mufflers
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Old Dec 29, 2025 | 03:42 AM
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Re: Disappointed in super transverse muffler!!

Flowmaster usually kills some hp along with the annoying sounds they make on certain exhaust setups.
Definitely better mufflers out there. As said above, with stock manifolds and cats, you won't get very loud.
​That's something you don't really want if you have a nice cruiser now. Imo.
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Old Dec 29, 2025 | 11:12 AM
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Re: Disappointed in super transverse muffler!!

Originally Posted by TTOP350
Flowmaster usually kills some hp along with the annoying sounds they make on certain exhaust setups.
Definitely better mufflers out there. As said above, with stock manifolds and cats, you won't get very loud.
​That's something you don't really want if you have a nice cruiser now. Imo.
I will leave it be. Just wanted a more aggressive sound.
Thanks for the reply.
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Old Dec 29, 2025 | 02:43 PM
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Re: Disappointed in super transverse muffler!!

Remove the cats.
who needs that crap. Unless you got purple hair and a nose ring. lol
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Old Dec 29, 2025 | 04:01 PM
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Re: Disappointed in super transverse muffler!!

Originally Posted by BURD
Remove the cats.
who needs that crap. Unless you got purple hair and a nose ring. lol
Definitely removing the cats. Ordered my air pump delete pulley yesterday as well.🙃
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Old Dec 29, 2025 | 06:06 PM
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Re: Disappointed in super transverse muffler!!

For what its worth, all the high end stuff we always put good quality cats on.
some of the clientele we work with dont like the smell of exhaust, and the cats work great.
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Old Dec 29, 2025 | 06:58 PM
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Re: Disappointed in super transverse muffler!!

I agree. Hydrocarbons don't smell great. In fact, they smell like ****, make your cloths smell like.... well you get the idea.

If you want "a more aggressive sound"....then "delete" the muffler that you already told us you don't like....keep the cats that actually do something useful. Your hot date will appreciate it.
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Old Dec 29, 2025 | 08:50 PM
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Re: Disappointed in super transverse muffler!!

Originally Posted by Tom 400 CFI
I agree. Hydrocarbons don't smell great. In fact, they smell like ****, make your cloths smell like.... well you get the idea.

If you want "a more aggressive sound"....then "delete" the muffler that you already told us you don't like....keep the cats that actually do something useful. Your hot date will appreciate it.
will keep that in mind.
Thanks.
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Old Dec 29, 2025 | 11:03 PM
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Re: Disappointed in super transverse muffler!!

Why does it need to be loud? Loud doesn't make it more powerful.
Doesn't your state have noise statutes?...
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Old Dec 30, 2025 | 02:15 AM
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Re: Disappointed in super transverse muffler!!

Older catalytic converters with beads inside robbed power. Modern design catalytic converters do not rob power. And without cats, you (as in your person) will badly stink of exhaust after you get out of the car.

People are always asking what exhaust to sound this way or that way. Just build for power and the sound will take care of itself.

Last edited by QwkTrip; Dec 30, 2025 at 02:53 AM.
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Old Dec 30, 2025 | 05:33 AM
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Re: Disappointed in super transverse muffler!!

Originally Posted by T.L.
Why does it need to be loud? Loud doesn't make it more powerful.
Doesn't your state have noise statutes?...
Not loud.....louder. That's all.
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Old Dec 30, 2025 | 10:07 AM
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Re: Disappointed in super transverse muffler!!

Originally Posted by QwkTrip
Just build for power and the sound will take care of itself.
like i stated above, no HP = no sound

you cant hide hp
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Old Dec 30, 2025 | 01:17 PM
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Re: Disappointed in super transverse muffler!!

Originally Posted by QwkTrip
Older catalytic converters with beads inside robbed power. Modern design catalytic converters do not rob power. And without cats, you (as in your person) will badly stink of exhaust after you get out of the car.

People are always asking what exhaust to sound this way or that way. Just build for power and the sound will take care of itself.
^^All of this. We have a Dynomax Race Magnum Muffler on the back of an otherwise stock exhaust system on our '92, and it sounds great, IMHO. Just a bit of sound inside, and sounds almost like a muffler delete outside. The car seems to have plenty of power, too, for a stocker. And FlowMasters are not known for making power, just that 'Flowmaster' sound.
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