Fox Exhaust Question

dz01 · Apr 29, 2014

So I bought my car with a s/s magnaflow system, BBK headers/race cat already installed. The car was extremely quiet. Too quiet for my liking. I subsequently pulled the cats off which definitely made it sound louder, but I didn't like the tone. Sounded raspy. I then replaced the magnaflow mufflers with s/s 2 chamber flowmasters. Car sounds great, but is extremely loud which is awesome until I get a phone call or I really get on it and draw a lot of attention from any near by law enforcement.

My question is whether putting the cats back on would quiet it down considerably or just a little?

I probably should have replaced the mufflers first.

I'm sure someone is running flowmasters with BBK headers/cat.

hoopty5.0 · Apr 29, 2014

cats always killed the sound on any mustang I've had.

Gearbanger 101 · Apr 29, 2014

We could've saved you a pile of time and money had you posted here sooner. Flowmaster's are universally known to be obnoxiously loud. Putting your cats back on will help a little, but nothing gets rid of that 1800-2300 RPM drone altogether. That's the nature of any chambered muffler.

Mustang5L5 · Apr 29, 2014

Cats will make the car quieter. Plus you will shift the torque curve lower which is much better for street driving.

25thmustang · Apr 29, 2014

Honestly the flowmasters are going to drone even with cats. It will be quiter but will drone still.

MFE92 · Apr 29, 2014

STOCK cats will make the car quieter, but race-style aftermarket ones won't make a dent.

If it's drone you want to kill, no ifs ands or buts, the easy way is to install some Dynomax VT mufflers, which have a valve in them that stays closed and pretty quiet until you romp on it. I have them, and I like them a lot. They are the ONLY muffler I've ever had on the car, that honestly didn't drone. I dont' give a what anyone says, every other muffler on the planet except for stock ones will drone unless you have longtubes.

The other way to completely knock it out is with 1/4-wave tube resonators. Harder to do, but works like absolute magic. http://www.stangnet.com/mustang-forums/threads/killing-drone-with-1-4-wave-tubes.861893/

Video of Dynomax VT's on my mustang, when I had dumps, with the microphone under the console directly below the armrest.

revhead347 · Apr 29, 2014

Taking off the Dynomax S/S mufflers and putting on 2 Chambers, on my god, that's like throwing out the shrimp sauce and pouring on ketchup. I'd put the dynomax's back on. They might be a little quieter, but at least you won't be seeing a psychiatrist in 5 years from post highway drone stress disorder.

Kurt

Grabbin' Asphalt · Apr 29, 2014

Gearbanger 101 · Apr 29, 2014

I've got the Pypes Race Pro's on mine and they're quiet and subtle and light cruise, throaty at moderate throttle and outright obnoxious at full cry. They're definitely a versatile muffler. Best part of all.....the're cheap. That being said, I also run long tubes and an O/R H-pipe.

santos · May 1, 2014

I also am running pypes violators, they are reasonably "quiet" at cruise, but get quite loud when your on the go pedal. mated currently with shorties and bassani off road x pipe

Audiophile · May 1, 2014

I have Flowmasters with stock cats. Yes, they drone some. It actually doesn't bother me too bad though. I've done enough sound deadening in my car to make it much better. I actually like the throaty tone, just wish it was a little louder. I don't like obnoxiously loud, or that popping cherry bomb stuff or whatever it is, but a good growl when you get on it always sounds good to me.

Norm Perreault · Aug 27, 2014

Has anybody heard or tried BBK, axle back adjustable

Gearbanger 101 · Aug 28, 2014

Had to get rid of my Pypes Race Pro's. Too loud. Got a set of Borla ProXS's in their place now. Much more reasonable for a street car.

89stang1 · Aug 28, 2014

My experience with cats over the years are ya cut or gut em!! theses days i just dont use them. The only exaust system that will ever be on my car is longtubes with shorty off road H pipe and Macs from there on back i have no drone its loud as hell but i like it that way just hold in the clutch and glide when law enforcement is around

Norm Perreault · Aug 28, 2014

Thanks for the feed back, how about roush

deathb4dismount · Aug 28, 2014

I had flowmaster 40s with dynomax cated h pipe. Just loud enough, but like everyone else said flowmasters will drone no matter what.

Fox Exhaust Question

dz01

Member

hoopty5.0

mechanicus terribilis

Gearbanger 101

Straight Outta Locash

Mustang5L5

That is…until I whipped out my Bissell

25thmustang

Mustang Master

MFE92

revhead347

Apparently my ex-husband made that mistake.

Grabbin' Asphalt

Gearbanger 101

Straight Outta Locash

santos

Audiophile

Well-Known Member

Norm Perreault

New Member

Gearbanger 101

Straight Outta Locash

89stang1

Stroked and Juiced

Norm Perreault

New Member

deathb4dismount

Crap, didn’t realize my crotch was in that picture

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