Quiet Performance Mufflers?

[packman]

My driver's side muffler is dying. It's a Summit welded Turbo Muff and the inlet pipe separated from the muffler casing. It's not terribly bad, just sounds like an exhaust leak for now. Hopefully I'll be able to get the muffler off of the exhaust without mangling the pipes. I'll probably replace it with the same muffler. However, if I can get the other muff off of the exhaust; I might just get better/more durable mufflers. The dual exhaust system is only 4 years old. So my question is: who makes a quiet performance muffler? I don't care if there's interior drone, just as long as it's quiet on the outside. I heard Dynamax makes decent flowing, but quiet mufflers. What say you?



Packman

[zoomie]

My driver's side muffler is dying. It's a Summit welded Turbo Muff and the inlet pipe separated from the muffler casing. It's not terribly bad, just sounds like an exhaust leak for now. Hopefully I'll be able to get the muffler off of the exhaust without mangling the pipes. I'll probably replace it with the same muffler. However, if I can get the other muff off of the exhaust; I might just get better/more durable mufflers. The dual exhaust system is only 4 years old. So my question is: who makes a quiet performance muffler? I don't care if there's interior drone, just as long as it's quiet on the outside. I heard Dynamax makes decent flowing, but quiet mufflers. What say you?



Packman

the hush thrush just came back out i heard nothing but good things abou them

[Smokestacklightnin]

I highly recommend magnaflow. They tend to be quiet until you really get into the throttle. Plus they have a lifetime warranty. I replaced the stock muffler on my 08 4.6 f150 crew cab with one, and is hardly noticeable till i get on it.

[slymer]

I highly recommend magnaflow. They tend to be quiet until you really get into the throttle. Plus they have a lifetime warranty. I replaced the stock muffler on my 08 4.6 f150 crew cab with one, and is hardly noticeable till i get on it.

I second this. My 93 vic and 88 MGM (stock engines) have duals with magnaflows (cats and mufflers) and the vic thumps some at idle (quietly) but will roar when you get in it... the mgm on the other hand will barely make much noise at all at idle and will not make a heck of a lot more noise when you hammer it with that lopo cam in it. It does sound nice IMO though.

[packman]

Magnaflows are pricey, but if they last longer than four years, I will seriously consider them. If they're not quiet enough, I can always throw some glasspacks on the tailpipes.


Packman

[gadget73]

I'm kinda surprised you only got 4 years out of those. My exhaust is about 5 years old and much of it is getting to that 'needs replacing' stage of life, but the mufflers haven't given me any trouble. They're the $15 each cheap of the cheap Summit turbos. I'd expect the welded ones to hold up better than the cheapo ones.

[packman]

Apparently this one didn't hold up. It's possible that it received an impact or two during the four years. The exhaust does hang kinda low. I'm really thinking about getting under the CV this spring and taking measurements of the current shorty headers and H-pipe. I'll use those measurements to bend and weld a set of longtubes. Perhaps if I do that right, I can tuck the exhaust up a little under the chassis. For now, I'm going to replace the one muffler or go with Magnaflows. I'll probably just get another Summit muff for now. That'll have to wait until there's no more snow left in the driveway.



Packman

[GM_Guy]

Magnaflows are a straight through muffler. Definately not quiet as far as I'm concerned, especially if you are looking for a muffler to be quiet.

The Walker Super Turbo is about the quietest of the performance muffler segment, but does not come in a stainless steel version if thats a requirement.

[P72Ford]

In my opinion, if you want quiet exhaust, do not buy a muffler that is all steel construction. You have to have some sound abating material in order to combat drone, and excessive noise.

I've never used Magnaflows (or quiet performance mufflers for that matter), but they have a great reputation. If you get some with a larger case, they will probably foot the bill perfectly.

[85crownHPP]

Anything 'turbo' muffler is a safe bet for being on the quiet side.

[DuceAnAHalf]

Flowmaster delta 50's. The keep my long tubed cat less 351 quiet enough to not draw any attention

[87gtVIC]

My magnaflows are pretty damn quite. Sounds nice when you rev up the engine though.

Currently running mustang headers into mustang h pipe into s10 mids into magnaflows then turndowns. Not loud at all at idle.

[ford man]

I like my dynomax 'hemi' super turbos... the hemi means there 21" instead of 14". Sounds just like super turbos, just a little quieter. You still get a nice balance of engine noise and exhaust noise.

[gadget73]

Do you have any fitment problems with the longer mufflers? I'm gonna need to replace mine, and I might be interested in the hemi superturbos if they fit up ok.

[packman]

I was thinking about the Hemi Super Turbo muffs. Especially if they come in a longer case; it wouldn't be imperative to pull or very carefully cut the old muffs off.



Packman

[ford man]

Do you have any fitment problems with the longer mufflers? I'm gonna need to replace mine, and I might be interested in the hemi superturbos if they fit up ok.

My crown vic has stock exhaust. I have the hemi's on my '76 gran torino but the chassis is very similar and there was plenty of room... I also have hemi's on my '73 mustang and they fit in there, barely...

There are some pictures of the hemi super turbos in my '76 gran torino readers ride thread...

There is a video of the '73 mustang in the multimedia forum...

[ford man]

I was thinking about the Hemi Super Turbo muffs. Especially if they come in a longer case; it wouldn't be imperative to pull or very carefully cut the old muffs off.



Packman

They would definitely make up some extra length mang! Hemi's are the longer 21" case.

[Piece-it pete]

I don't have much experience with mufflers for comparison. I like the magnaflows I currently have.

Once in a blue moon the drone irritates me on the highway, but I like the way it sounds like a v8 even at idle.

Occasionally they do catch a resonating frequency with the rear quarter, makes a buzzing noise I haven't found yet. But not a big deal.

Pete

[over2tonsofFun]

I have the Jegs performance mufflers on the cat back system I put on my Town car. they are quiet. the cats are leaking so it a little noisy.

Tim

[1987cp]

I thought you liked loud?


I request you to get Walker Quietflows. Primarily because I want to hear what they actually sound like. :D

IMO, performance mufflers = loud. Though Super Turbos aren't too awful. My short-lived Super Turbo system might have been pretty bearable if not for pipes trying to resonate me into oblivion.


I also have a couple pairs of Flowbastards you could have for cheap. :)

[packman]

I thought you liked loud?


I request you to get Walker Quietflows. Primarily because I want to hear what they actually sound like. :D

IMO, performance mufflers = loud. Though Super Turbos aren't too awful. My short-lived Super Turbo system might have been pretty bearable if not for pipes trying to resonate me into oblivion.


I also have a couple pairs of Flowbastards you could have for cheap. :)


Nah, no Flows for the CV. It's not me that likes the car loud, it's my mom. Ever since she drove my old Malibu, she wanted her car to be just as loud. I'm not 20 years old anymore and I would like something that I can start up in the morning w/o waking the neighbors; that's what cutouts are for anyways;). Aren't the only Walker Quiet Flows in a 2.5" size for a Caddy and go for $100 a pop?



Packman

[1987cp]

Size and configuration are perfect for a Panther, but yeah, and price is the main reason I didn't try them (got a good deal on the Super Turbos, which according to the "Sounds of Dynomax" video were only a little louder).

[Lincolnmania]

regular old thrush turbos in the larger case size are pretty quiet

[slymer]

I would like something that I can start up in the morning w/o waking the neighbors; that's what cutouts are for anyways;).

cutouts?
http://www.superstang.com/Exhaust/index.html
I'd like me this exhaust idea on my 93 vic. have some ricer pull up with a loud fart can and then open the bypass valves :evil:

[P72Ford]

The welding and fabrication in that link is absolutely hideous.

The proper way to install an electric dump tube, is with a flanged wye pipe.

I have an electric dump tube on my Dodge. See below:

AILi63k7tbY

Yes... that exhaust is on my daily driver, and I wind it up quite a bit. But sometimes the drone and buzzing interior trim drives me a little wonky on my way into work at 6 am.

*EDIT: Damn, my truck was dirty in that video...

[slymer]

The welding and fabrication in that link is absolutely hideous.

The proper way to install an electric dump tube, is with a flanged wye pipe.


true... I said I like the idea... didn't say anything about the implementation. :smirk:

[hemihotrod402]

regular old thrush turbos in the larger case size are pretty quiet

this....we have some on my dad's street rod (carbed 302, mild cam) And they are really quiet. They have a nice low rumble (but not really loud, almost perfect) at idle, and at speed, are virtually silent (until you get on the accelerator). And last time I checked, they are like 30 bucks a pop.

[1987cp]

$30? Pfft. My generic turbo-type economy mufflers (19" case) were more like $19 each. :2up:

[packman]

I'm definitely considering welding up a set of long tubes. The only thing that has me a little queasy is welding the primaries to the collectors. The center of each collector seems to be inaccessible. Perhaps brazing? Or sweat fitting the collectors to the primaries? Hmmmmm.....something to think about.


Packman

[slymer]

press forming the 4 pipes to make a + in the center... or just fill in the gaps with weld. I've also seen some make a pyramid-ish shape to fill up the gap and weld that in then put the collector on and weld around. The idea behind the pyramid is to kill the dead air space in the collector. Less eddies... better flow.

[Brown_Muscle]

Hey guys...not to drag up an old thread buttt....I've been looking at the magnaflows. I have flowmaster 40's, the original 40s, on my car now and they drone like crazy at any speed after 60, It's pretty annoying!

I was looking at the XL 3 magnaflows, http://www.summitracing.com/parts/mpe-13236/overview/ and I was wondering how different these were from the other regular magnaflows.

I like to hear the car at idle, would like it to be heard when i get on it, but no drone when cruising. Inputs?

[jaywish]

Just a fyi I like the 2011 mustang gt mufflers ok. They have a nice sound. They do drone a bit at the low end of third or fourth gear. Once you get past lugging along they are fine. 50-55 is about the worst. At about 60 the drone is gone. I have 3.08 gears.

[slymer]

3-chamber mufflers... see here: http://www.etrailer.com/Mufflers/MagnaFlow/MF13219.html

regular magnaflows are not baffled but use a perf pipe bent to match up with the offsets (this is what I have on my vic and grand marquis).

This reminds me, I need to make a new exhaust vid for the vic.

[t65neon5]

i have a pair of flow tech raptor turbo style mufflers on my town car.....they are quiet,but "louder" than stock....wide open you can just hear them inside,and at least at idle,they are quiet outside also.......(i think they are $28 bucks a piece)

[Pesty351]

Quiet with performance

http://www.jegs.com/p/Dynomax/Dynomax-VT-Mufflers/1316158/10002/-1

[Brown_Muscle]

Quiet with performance

http://www.jegs.com/p/Dynomax/Dynomax-VT-Mufflers/1316158/10002/-1

Looks nice, a bit pricey, probably worth it though...I doubt they would be reliable in a few years when the components that aren't stainless got rusty and carboned up though.

[jaywish]

Ford stainless from Mustangs....

[Lincolnmania]

i installed walker quietflows for a newer rwd chrysler on yucatechs wagon, nice and quiet!

[merc91]

straight through design (glasspack)... performance.
baffles/chambers... quiet, or loud but neglagable performance gains.

Add me to the pro-magnaflow side if you want a quieter performance muffler unless theres a nicer quality quieter glass pack muffler. Ofcourse good condition cats mellow out the sound without losing flow, as does the volume of your exhaust system (duals, full length tail pipes, and pipe diameter)

[BigMerc96]

I love my Magnaflows. Had them on both Panthers, the sound is great, and they aren't too terribly loud. My buddy has a pair of Magnaflows on the end of the H-pipe on his Colony Park with no tailpipes and its not even that loud. He has all the cats tho, as do I.

[packman]

I have one Dynamax Super Turbo and one Dynamax Hemi Super Turbo on the CV and it was fairly quiet when everything was leak-free. I wonder if it would be a little more quiet with two Hemi SUper Turbos?


Packman

[1987cp]

i installed walker quietflows for a newer rwd chrysler on yucatechs wagon, nice and quiet!

Like.

[88Vic]

I have no mufflers on my Town Car and not loud enough for me. Has a tad bit of drone but it's more of a background noise, not annoying loud at all. With manifolds, 4 cats and small pipes it's no wonder it's so quiet even with no mufflers. Had people tell me it sounds pretty good but no one has said it's loud, unless I rev it past 3k then it'll scream. And when the cats are cold, and I mean on a cold day, they sound awesome before they get warm when I give it half throttle of more.

But to the point I don't see how reqular 14" case turbo mufflers could be too loud for anyone with a stock lopo, the fan would be louder.

[Lincolnmania]

the drone, i dont care much for drone, my mk7 is downright annoying at certain rpm's

[TheMightyQuinn]

Mufflers are overrated. Open pipes, FTW.

[phayzer5]

Open pipes are redneck and stupid, serving only as a noise maker. Very few folks on this board can benefit from an open exhaust; those that can probably still use a muffler of some sort...

[packman]

Open pipes are redneck and stupid, serving only as a noise maker. Very few folks on this board can benefit from an open exhaust; those that can probably still use a muffler of some sort...

Cutouts FTW!!! Best of both worlds.



Packman

[turbo2256b]

You might check out the IMCO 2 pass turbo mufflers. They are also one of the few that are galvized inside and out. Most dont do the inside. They are made in Texas also bought up thrush a while back. I run the IMCO 3 pass muffs on the dually and same ones on Creamy. About as quiet as stock so I dont need a 1000 watt amp or ear plugs like the 3" Flowmaster junk on my 78 4x4 150.

[sxcpotatoes]

Cutouts FTW!!! Best of both worlds.



Packman

Actually, a 2.5" full exhaust with no cats & no mufflers serves me just fine. Mean at idle, step on it for full-angry, and with the crossover, no drone.

Plus, all the noise is from under the hood or behind the rear axle, just as the gods intended!

[Lincolnmania]

people might want to read the title of this thread before posting

[sxcpotatoes]

NO! Reading is for uppity people!

[88Vic]

It's amazing to me how much a Magnaflow keeps the exhaust quiet when you look inside it. I went from a burned out Summit glasspack (stupid choice, it has a louvered core, if you're gonna get a glasspack at all a perforated core flows better) to an 18" Mag and it was night and day, when from loud and annoying to smooth, deep and toned. And when I had my 24" case Mag on it with no cat, it was very quiet in the cab with tails out the back, could barely hear it at all inside.

I vote Magnaflow but since they're stainless and a tad pricey it's worth it to put one in a stainless system, for a temporary aluminum system a turbo muffler works great, they're not even loud with no cats and perform better than any OEM-style muffler.

[TheMightyQuinn]

Open pipes are redneck and stupid, serving only as a noise maker. Very few folks on this board can benefit from an open exhaust; those that can probably still use a muffler of some sort...

Redneck and stupid? Hardly. On my old '89 i replaced the cats and muffler with pipe. Sounded pretty damn good and was only loud when i got on it. Some drone at certain speeds, but that was easily remedied by driving a different speed.

Honestly, in my opinion for a quiet exhaust that flows well keep it single exit 2 1/4" pipe with a resonator. Do cats if you're worried about emissions or want it toned down a bit more. Lo-Po 302s don't really make alot of noise as it is.

But, that's just my opinion.

[johnunit]

Redneck and stupid? Hardly. On my old '89 i replaced the cats and muffler with pipe. Sounded pretty damn good and was only loud when i got on it. Some drone at certain speeds, but that was easily remedied by driving a different speed.

Honestly, in my opinion for a quiet exhaust that flows well keep it single exit 2 1/4" pipe with a resonator. Do cats if you're worried about emissions or want it toned down a bit more. Lo-Po 302s don't really make alot of noise as it is.

But, that's just my opinion.

a 2 1/4 single is a restriction, even on a stock lopo. A significant one.

[turbo2256b]

Interesting find with cutouts and EFI. Data loging my set up with the 3 pass mufflers and the 5.0 EFI Victor set up. Tuning for closed cutouts fairly close to correct found that open cutouts required a seperate tune about 20% richer. With the carbs dosent seem to matter. Havent rebuilt and reinstalled the cutouts this year as flooring Creamy with them completely closed bent the blades in them a few times. 25.00 apeace for the parts to rebuild.
Without the seperate tune for open cutouts with the EFI set up Creamy was slower.

[BigMerc96]

My buddy's '91 came with 1/2 an H-pipe that was completely rotted off of the cats. The other half and 1 of the tailpipes were missing, and the 1/2 that was there was tied up to the floor. Anyway, he drove it like that for 6mo, no obvious ill effects to the car. Really wasn't that loud, the 4 cats quieted it down quite a bit, but it did rattle everything in the interior and give you a foot massage. Still haven't found wagon tails for it, but we bought an OEM H-pipe and tails from a '90 Town Car. H-pipe bolted right in, welded Magnaflows to it, but the tails will require work to fit.

[TheMightyQuinn]

a 2 1/4 single is a restriction, even on a stock lopo. A significant one.

Sorry, I meant to write 2 1/2. 2 1/4 is stock size is what I was thinking of when I wrote that.

And I don't mean to undermine what any of you guys are saying. You've all been around boxes and 5.0s alot longer then, I'm sure. This is just what I feel would perform best for the power made and the majority of driving done. I hardly ever get above 3K rpm. Having an exhaust that flows best at 5K means it's too big elsewhere and that can hurt just as much as being too small.

[merc91]

touche. And to the extream, with my electric cutouts... they lose 12ft/lbs of tq but gain me 10hp on a 300hp motor. With the heavy cars I lost a few hundredths in the quarter. Although my a/f ratio didn't change. On nitrous the cutouts gained lots of necesary extra breathing at 500hp and picked up nearly a tenth in the quarter over going through an exhaust system. For a 300hp or less car on the street, I cant see a magnaflow being beat performance wise or sound wise.

[packman]

I replaced the section of piping right behind the H-pipe (cat'd) to the driver's side muff. I cut the one end right behind the cut out and un bolted the flange. It turns out that the flange developed a rotted hole, which created fatigue, that resulted in twisting a larger hole at the flange. We got used to the noise except my father. Now that everything is replaced, it's much more quiet and no drone in the car. Yay me :) Though my mom is pissed now. Oh well, can't please everybody. And yes, the Dynomax's are fairly quiet; but that's for a lopo. Dunno how they would sound with anything hotter.



Packman

[turbo2256b]

At one point I had equi headers off road mustag H pipe 2 1/2 ioto stock dual mufflers. Pulled 270 RWT at 2500 RPM. maxed around 3400 300 RWT at 4600 had 270 RWT. Strange thing HP and torq curves never crossed. If they would have had to be near 6K intake probably the most limiting factor. It was real quick and got the 32.9 MPG highway and 22 ish in town.