Fox Dynomax Catback.

Saminator0107 · Oct 22, 2017

Has anybody ever tried the dynomax catback? I'm thinking about getting it for my 88 LX, with BBK shorties and a x pipe. What is your opinions on it, since ive never tried it. Im either going to go SLP Loudmouth 1's or the dynomax ultra flo catback.

http://www.dynomax.com/exhaust-systems/?find=1988-ford-mustang-34148
OR
https://lmr.com/item/SLP-M31015/86-93-Mustang-50L-LX-SLP-Loud-Mouth-Cat-Back-Exhaust-System

Dan02gt · Oct 23, 2017

I don't have the catback but I do have the Dynomax Super Turbo mufflers welded in to the stock catback. I also have JBA shorty headers and a BBK H pipe. The Dynomax mufflers were on the car when I bought it and my first instinct was to rip them off for something "better" but they actually sound pretty good. About like 2 chamber Flowmasters only a little deeper and without as much drone.

After typing all this it just clicked in my head that your were asking about the Ultra Flo not the Super Turbos. I haven't heard those but I have heard plenty of SLPs and don't really care for the sound.

MFE92 · Oct 23, 2017

Of the three, the Super Turbos sound the best IMO. I didn't like Ultra Flows much when I had them, and I've never heard an SLP system that sounded good to me.

02 281 GT · Oct 23, 2017

The SLP resonators are one degree away from being a redneck "straight pipe" system with the terrible sound you'd expect.

I've used Dynomax tailpipes and flow tubes before and can say that they fit very well. Check youtube if you want to hear some sound clips of the mufflers you're looking at.

RaggedGT · Oct 23, 2017

Just to slightly derail and throw another brand up- I’ve been considering the Gibson MWA mufflers-

I’ve not heard any in person. But I like the design idea lol

Saminator0107 · Oct 23, 2017

Dan02gt said:
I don't have the catback but I do have the Dynomax Super Turbo mufflers welded in to the stock catback. I also have JBA shorty headers and a BBK H pipe. The Dynomax mufflers were on the car when I bought it and my first instinct was to rip them off for something "better" but they actually sound pretty good. About like 2 chamber Flowmasters only a little deeper and without as much drone.

After typing all this it just clicked in my head that your were asking about the Ultra Flo not the Super Turbos. I haven't heard those but I have heard plenty of SLPs and don't really care for the sound.

Okay, cool. Ill also check the super turbos and look those up on youtube.

MFE92 said:
Of the three, the Super Turbos sound the best IMO. I didn't like Ultra Flows much when I had them, and I've never heard an SLP system that sounded good to me.

Okay, i was just wondering about people’s opinions. Its kinda hard to tell on youtube with the slp on how they sound, cause their so dang loud, lol. Thanks for the info though.

RaggedGT said:
Just to slightly derail and throw another brand up- I’ve been considering the Gibson MWA mufflers-

I’ve not heard any in person. But I like the design idea lol

Hmm, ill check those out! Thanks for reccommending man.

95BlueStallion · Oct 23, 2017

There were SLP LM1's on my SRT8 Charger when I bought it, and it sounded like a dump truck. I would never pay money for them, personally.

revhead347 · Oct 23, 2017

Kind of a weird that you are up in the air between those two options; there couldn't be two more different muffler choices on the planet. The SLPs are loud and obnoxious, and the Dynomax UltraFlow SS mufflers are about as quiet as you can get. The performance difference between the two is negligible. I run UltraFlows because I like it quiet and there is no drone. Some prefer the Super Turbo mufflers from Dynomax, but they do suffocate the flow more than the UltraFlows. I've had the same UltraFlows on my car for 18 years now, and they still look like new if that helps any. All the Flowbastards I ever had rusted out in 4 years.

Kurt

Saminator0107 · Oct 23, 2017

revhead347 said:
Kind of a weird that you are up in the air between those two options; there couldn't be two more different muffler choices on the planet. The SLPs are loud and obnoxious, and the Dynomax UltraFlow SS mufflers are about as quiet as you can get. The performance difference between the two is negligible. I run UltraFlows because I like it quiet and there is no drone. Some prefer the Super Turbo mufflers from Dynomax, but they do suffocate the flow more than the UltraFlows. I've had the same UltraFlows on my car for 18 years now, and they still look like new if that helps any. All the Flowbastards I ever had rusted out in 4 years.

Kurt

Cool, Im leaning more towards dynomax, i just wanted opinions, thanks for sharing!

Saminator0107 · Oct 23, 2017

95BlueStallion said:
There were SLP LM1's on my SRT8 Charger when I bought it, and it sounded like a dump truck. I would never pay money for them, personally.

Okay, im most likely getting dynomax, thanks for sharing!

Steel1 · Oct 24, 2017

Replaced my Pypes Violators because I wanted something with less drone and a little more mellow tone.
Went with the Ultraflows and now I can talk in the car at 2-3k rpm and the sound is more refined,
happy with my choice.

2000xp8 · Oct 24, 2017

I use the ultraflo welded muffler catback. The chrome ones are cheesy.
Fits good, sounds good, although I still have my days where I wish it were quieter.
Very little drone.
Fit's with a panhard bar right out of the box.

SLP, forget about it. All they simply do is make it loud.

Gear grabber · Oct 24, 2017

RaggedGT said:
Just to slightly derail and throw another brand up- I’ve been considering the Gibson MWA mufflers-

I’ve not heard any in person. But I like the design idea lol

As long as we are derailing...I like the Jones max flows,pretty quiet at idle/cruise
(considering design) no drone. https://www.summitracing.com/search?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=jones max flow

revhead347 · Oct 24, 2017

The test of a good performance muffler is usually simple. Take the muffler out of the box and drop your car keys in one end. If they come out the other then it's usually a good muffler. If your keys don't come out the other end, well , I guess you call a tow truck. Bottom line is that a lot of muffler companies throw all kinds of baffles in there to make it sound more aggressive, but it doesn't do anything for performance, and usually it makes the mufflers drone at highway speed too.

Kurt

2007_Crown_Vic · Oct 28, 2017

I am in the same boat wanting to change exhaust systems and have spent probably hours scouring the internet trying to come up with a good decision. I would have to agree with most here, although I have never heard SLP in person what I have heard online sounds like it would be a little much for a daily driver or for some even a weekend car. It is always hard to tell online especially trying to find one with a similar level of upgrades with the exhaust system you want to hear.

Right now I have the Flowmaster Force 2 Cat Back Exhaust that the car came with. I do have to say other than not being as loud as I would like it to be it does sounds quite nice and doesn't have any of the droan Flowmaster is known for. Because of this I was thinking of just going to a similar Flowmaster American Thunder cat back system, but my constant searching and discussing with people lead me to the MAC system here: http://www.themustangshop.ca/product/303584/658781

That is for the GT, but I think they make the same system for the LX too. Just a thought. MAC seems to be a much lesser known system but I haven`t encountered anyone yet that doesn`t like the sound (supposed to be really deep and mellow at adle and normal driving like an old muscle car but really start to scream when pushed). The only negatives I have heard about them is that some of MAC`s stuff rusts out apparently, but I have also heard that they have fixed this old problem so I don`t know. Other than that, build quality seems good, they even have that balljoint type connection for added adjustability when installing.

Here are some LX options off thier webpage: http://www.shop.macperformance.com/Cat-Back-Pro-Dump-Systems_c221.htm

2000xp8 · Oct 28, 2017

Mac sounds just like flowmaster, in some cases you can't even tell them apart.
Calling their build quality questionable would be an understatement.
I wouldn't use anything they make again even if they gave it to me for free and paid me to use it.

BREEZY7150 · Oct 29, 2017

I've got Dynomax Ultra Flo's on my 89 GT Convertible and I LOVE them, classic good sound without being obnoxious

Adieu · Oct 29, 2017

I liked the Dynomax Super Turbo catback on my GMC pickup so much I switched from Flowmasters to Dynomaxes on my Mustang.

Fox Dynomax Catback.

SLP LM1's or Dynomax Ultra flo?

SLP

Dynomax

Saminator0107

Dan02gt

mazing how much gas smell came from that tiny hole

MFE92

02 281 GT

Agreed...My wife has great Boobs

RaggedGT

Been here over a DECADE and still no CT

Saminator0107

95BlueStallion

My assy trans to myself

revhead347

Apparently my ex-husband made that mistake.

Saminator0107

Saminator0107

Steel1

Mustang Master

2000xp8

Gear grabber

Well-Known Member

revhead347

Apparently my ex-husband made that mistake.

2007_Crown_Vic

Active Member

2000xp8

BREEZY7150

New Member

Adieu

Easy there, this ain't a dating site.

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Agreed...My wife has great Boobs

Been here over a DECADE and still no CT

My assy trans to myself

Apparently my ex-husband made that mistake.

Mustang Master

Well-Known Member

Apparently my ex-husband made that mistake.

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Easy there, this ain't a dating site.

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