Mufflers with SW 3"

[Cougar_Marauder]

I have full SW exhaust and I'm about to make my appointment with the shop for different mufflers but I need to know what is the biggest muffler I can stuff under the car. From what I can find I think it is 18" (case) Magnaflo ... is this the right one? -> http://www.summitracing.com/parts/mpe-11259/overview/

I really like the way it sounded when I had stock exhaust with rear cat and resonator delete but I don't know if I will ever be able to get that sound again.

I know everybody has their opinion on this but I will take any suggestions for large/semi-quite mufflers.

[MOTOWN]

Those will work perfectly, the shop will just have to open up the tail pipes to 3" , and you will be good to go , and you will be glad you did, the MagnaFlow mufflers sound 1000 times better!

[Cougar_Marauder]

awesome. One more thing that bothers me with the SW is some sort of loud rattle coming from the back, especially when I put it in reverse... It seems to me I read something about this a long time ago but I can't find it now. Is this a common problem and what needs to be done to make it go away?

[MOTOWN]

Check to make sure none of the exhaust is contacting the body of the car , or the rear bumper cover, once Stainlees steel gets to it's operating temperature it expands , and moves around a bit.

[justbob]

Check that it's not sitting on the watts link on the pass. side.


Builder Of Badassery

[tbone]

My car is in the shop now for various performance mods that I don't have time to do anymore. One of them is removing the underwhelming SW cans and replacing them with Magnaflows. I love the sound they make.

[tbone]

Check that it's not sitting on the watts link on the pass. side.


Builder Of Badassery

I'm having the Metco Watts link I bought last year installed. It was bad enough with the standard link rubbing without some trimming and adjusting.....The Metcos are beefy.

[tbone]

I bought these chambered ones because they reduce drone and I don't want it too loud.

http://www.summitracing.com/parts/mpe-13259

[Cougar_Marauder]

Check to make sure none of the exhaust is contacting the body of the car , or the rear bumper cover, once Stainlees steel gets to it's operating temperature it expands , and moves around a bit.


Check that it's not sitting on the watts link on the pass. side.


Builder Of Badassery



Thanks, I will have him check that out.



I bought these chambered ones because they reduce drone and I don't want it too loud.

http://www.summitracing.com/parts/mpe-13259


Hmmmmmm....I might go this route too, is the sound of the chambered the same/similar as the strait through?

[Logizyme]

Typically chambered mufflers will have a more old-school bubbly sounds, and are more likely to drone.

Packed mufflers like regular magnaflows tend to have a more modern sound and less likely to drone unless they are too small/oversized pipe.

[justbob]

Aren't the S.W. Mufflers a chambered muffler? Honestly I didn't bother to look. I just know they have the exact same stupid raspy sound as the chambered Flowmaster delta 50's I had when I installed my old home modified headers and X pipe! They sounded great until I did the headers and X.. Then I hated it (like now with these S.W. ones)

I simply installed the Magnaflow 18" cased ones on that set up and LOVED it! I feel like I spent $1,800 for just looks and performance and ended up with something that sounds awful, can't take apart in sections, and fit like crap.


Builder Of Badassery

[tbone]

Typically chambered mufflers will have a more old-school bubbly sounds, and are more likely to drone.

Packed mufflers like regular magnaflows tend to have a more modern sound and less likely to drone unless they are too small/oversized pipe.

The ones I got says they are specifically designed to reduce "unwanted resonance" or I assume they mean drone.
Not an expert on mufflers. The last set of Magnaflows I got were perfect. They weren't stainless steel like these though. I hope they sound the same. I don't remember if they were chambered or not.

[tbone]

Aren't the S.W. Mufflers a chambered muffler? Honestly I didn't bother to look. I just know they have the exact same stupid raspy sound as the chambered Flowmaster delta 50's I had when I installed my old home modified headers and X pipe! They sounded great until I did the headers and X.. Then I hated it (like now with these S.W. ones)

I simply installed the Magnaflow 18" cased ones on that set up and LOVED it! I feel like I spent $1,800 for just looks and performance and ended up with something that sounds awful, can't take apart in sections, and fit like crap.


Builder Of Badassery

What do you mean "cased" muffler? Did you go with chambered or straight through?

[justbob]

What do you mean "cased" muffler? Did you go with chambered or straight through?


I meant 18" case. The ones I bought were stainless 18". One now resides on my F150 LOL

As for design I have no clue. I thought they were straight thru with packing? I could be wrong on the packing part. All I know was they weren't the traditional chambered like Flowmaster and sounded WAY better.

Back to thread.


Builder Of Badassery

[babbage]

My setup is quiet and flows great, have SW longtubes with their 3" cats then out to a straight through magnaflow muffled X pipe and then Borla ProXS (http://www.mercurymarauder.net/forums/showthread.php?t=91483) that are 25" overall length.

Another great quiet flowing muffler is the Dynomax Super Turbo, (factory style perforated offset tubes) with an overall length of 25". Longer is better if you want quiet.

Also check/resize your rubber mounts so exhaust is aligned and less loose.

[Cougar_Marauder]

So to get the Borla with a 19" case you had to go down to 2.5" at the muffler inlet? I guess that wouldn't matter anyway.
Also, is there such a thing as a muffled H pipe?

I guess as of right now I'm about to flip a coin on 18" Magnaflo vs 19" Borla. I only hear good things about both of them.

[Logizyme]

The ones I got says they are specifically designed to reduce "unwanted resonance" or I assume they mean drone.
Not an expert on mufflers. The last set of Magnaflows I got were perfect. They weren't stainless steel like these though. I hope they sound the same. I don't remember if they were chambered or not.

All the standard Magnaflows the straight-through perforated tube glass packed mufflers are stainless.

The XL series that you linked are built similarly to universal replacement mufflers, but in stainless, and not really comparable to a performance chambered muffler.

[tbone]

Well they sure make them sound special in their description. I'm sure they will be sound good, and certainly better than SW muffs. I'm 99% sure these are the same ones I had last time and had so many compliments.

So to the OP, I think it's fair to say that whatever Magnaflow you get, it will be a good choice. Borla, never heard them in person.


MagnaFlow XL 3 chamber mufflers use a unique combination of large-diameter perforated tubing and strategically placed sound baffles to reduce unwanted resonance and help your engine create horsepower. The sound baffles tune the sound waves using calibrated tuning gate openings that allow portions of the waves to pass through. These tuned waves reflect off the back wall of the muffler and cancel out unwanted harsher sounds. The large-diameter perforated core eliminates the flow restrictions of a louvered-style core. A careful balance between perforation size/spacing and the baffle tuning gate makes for great 3-chamber performance mufflers.

[RubberCtyRauder]

I have the 19" case Borla and am happy with them..Kooks headers and their xpipe which I want to change to an h pipe. I had a bad drone with the 18" magnaflows that were on the car at hiway speeds..about wanted to kill the car after a 12 hour ride in it. The mufflers were like 8 tyears old and the tips were possibly not out far enough from under car. I changed that with the Borlas and now it is quiet at hiway speeds but definitely gets louder at heavy throttle.

[babbage]

So to get the Borla with a 19" case you had to go down to 2.5" at the muffler inlet? I guess that wouldn't matter anyway.
Also, is there such a thing as a muffled H pipe?

I guess as of right now I'm about to flip a coin on 18" Magnaflo vs 19" Borla. I only hear good things about both of them.

Since you don't have cats? - the sound will be louder.
Quiet it down with this: https://www.magnaflow.com/products?partNumber=11386

http://www.ls1gto.com/forums/attachment.php?attachmentid=15 5386&d=1346723998]

Straight thru Muffled X pipe. More power than an H, much quieter than a regular X. Only goes up to 2.5", Dynomax may have a dual, dual, 3" that is similar.

[tbone]

I went by my friend's shop a little while ago. My car was in the muffler shop in the same building and they installed my Magnaflows today. Sounds absolutely killer. Loud and mean..... Exactly what I wanted. Not too loud. Not raspy one bit. 100000% improvement over the SW muffs. Waiting for some more things to get buttoned up. I'm stoked.

These are in no way "universal replacement mufflers".

MagnaFlow XL 3 chamber mufflers use a unique combination of large-diameter perforated tubing and strategically placed sound baffles to reduce unwanted resonance and help your engine create horsepower. The sound baffles tune the sound waves using calibrated tuning gate openings that allow portions of the waves to pass through. These tuned waves reflect off the back wall of the muffler and cancel out unwanted harsher sounds. The large-diameter perforated core eliminates the flow restrictions of a louvered-style core. A careful balance between perforation size/spacing and the baffle tuning gate makes for great 3-chamber performance mufflers.

[tbone]

So to get the Borla with a 19" case you had to go down to 2.5" at the muffler inlet? I guess that wouldn't matter anyway.
Also, is there such a thing as a muffled H pipe?

I guess as of right now I'm about to flip a coin on 18" Magnaflo vs 19" Borla. I only hear good things about both of them.

Magnaflow. Trust me.

[JBeezy]

I have these on my Mustang. Identical to Magnaflows, but tested to outflow Magnaflow. 1/3 of the cost as well. I love the way they sound. These are 3" I have less than $100 in them shipped.

http://i20.photobucket.com/albums/b208/impalasscars/20140929_173905.jpg (http://s20.photobucket.com/user/impalasscars/media/20140929_173905.jpg.html)

http://i20.photobucket.com/albums/b208/impalasscars/20140929_173924.jpg (http://s20.photobucket.com/user/impalasscars/media/20140929_173924.jpg.html)

https://youtu.be/_UgzZqFkayg

[tbone]

Pushing air through is the goal of course, but there's a reason why they reduce from 3" to 2.5" on our setups. Back pressure. Too much flow is a bad thing. Or am I missing something?

[MOTOWN]

Pushing air through is the goal of course, but there's a reason why they reduce from 3" to 2.5" on our setups. Back pressure. Too much flow is a bad thing. Or am I missing something?

They reduced it to 2.5 at the mufflers because it's extremely difficult to get 3" pipes over the axles on a Marauder, and 2.5 cost less, and for 90% of Marauders it's more than sufficient.

[tbone]

Mmm. Yeah, those Watts links are a b**** to clear.

If they reduced it to 2.5" from the rear of the mufflers and over the axles just to save $$ when the system is already $1200 list, that would be rather chintzy.

But there is a point where too much air flow hurts performance. I thought it applied to our MM's in this case.

[Cougar_Marauder]

Well I ended up going with the MagnoFlos and they sound much better than the SW, but it is still a bit too loud for me. I am considering the muffled X but originally wanted an H pipe put in.... I currently have no catalytic converters so I am thinking to add cats + H pipe but I am wondering how much noise reduction I would actually get from a set of cats... does any body have any experience with their set up with and without cats?

[tbone]

They settle down once they are run in for a while. Yes, Cats will help. I put my high flows back on only because I don't like smelly exhaust.

[Logizyme]

Maybe just add a pair of glass pack resonators...

[MOTOWN]

Maybe just add a pair of glass pack resonators...

Do not put glass pack anything on your car you will hate it! I went with MagnaFlows 4" round by 14" long mufflers in place of the cats with an H pipe, sounds great, and is quiet until you get on it.

[Cougar_Marauder]

I'm not to keen on glass packs either. But I was looking into the resonators, I guess I never even knew there were separate 'resonators'... not sure how it differs from a muffler, like this one here (http://www.summitracing.com/parts/vpe-1142/overview/) it's similar in dimensions to the MagnaFlos you mention. It has good reviews.

[MOTOWN]

I'm not to keen on glass packs either. But I was looking into the resonators, I guess I never even knew there were separate 'resonators'... not sure how it differs from a muffler, like this one here (http://www.summitracing.com/parts/vpe-1142/overview/) it's similar in dimensions to the MagnaFlos you mention. It has good reviews.

Funny you should post this, those were my 2nd choice, i just went with the MagnaFlows because I used there main mufflers on my setup a 29X11X5 muffler in the original mufflers place, wanted mines quiet, i love the tone , and sound.

[Cougar_Marauder]

I decided to go with the Vibrant Performance Ultra Quiet Resonators (http://www.summitracing.com/parts/vpe-1142/overview/). They look great and the construction seems really solid. It will be a week or two before they are on but I will try to post up a sound clip if I can.

[Cougar_Marauder]

I haven't had a chance to get a sound clip but with the resonators on it is still too damn loud. It sounds OK (I need to get the car out to Lidio for a proper tune though) but it's just loud. . . So loud I got pulled over the day after I had the resonators put on. I don't know what else I can do other than the muffled X pipe but I had a custom H pipe put in so I don't want to take that out.
Has anybody ever tried these Insert Cones (http://www.jegs.com/p/Dynatech/Dynatech-Vortex-Insert-Cones/750014/10002/-1)? I can't see them being too noticeable. I need a decent, relatively cheap, way to bring the noise down..... or win the lotto and start over.

[MOTOWN]

The only way your going to quiet down the stainless works exhaust is to swap out the garbage stainless works mufflers, thats your problem.

I see you added magnaflows , what size case and pipe diameter did you go with?

[justbob]

I'm kind of surprised it's too loud with the Magnaflows?


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[lji372]

I'm kind of surprised it's too loud with the Magnaflows?


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Because POWA!!!!! :bows:

[MOTOWN]

Because POWA!!!!! :bows:

LMAO!:banana2:

[marauderrocks51]

I just ordered those magnaflows . I also have SW complete system . those SW mufflers sound like a ghetto cruiser with that big can hanging out the back . SW states "there are a few straight perforated cores internally with chambers to deaden the sound . " there words . when I install the magnaflows these Sw muffs are going with the rest of the scrap to the yard . I hate to get on it with that terrible sound .

[justbob]

I don't mind the idle or the WOT. It's everything in between. [emoji26]


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[lji372]

I don't mind the idle or the WOT. It's everything in between. [emoji26]


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WOT it is then!!!! :beatnik:

[Cougar_Marauder]

The only way your going to quiet down the stainless works exhaust is to swap out the garbage stainless works mufflers, thats your problem.

I see you added magnaflows , what size case and pipe diameter did you go with?

My entire setup right now is a 5.0 stroker with a Trilogy going through SW headers to the Vibrant Performance resonators (10" long by 4.5" x 6.75" oval) to an H-pipe to Magnaflows (18" case) to resonator delete tips (I wanted to put the original tips on but the resonator brings the pipe size down to 2.25" I think, not sure if that would be a bad idea). The exhaust is 3" until after the mufflers it's 2.5" (3" probably makes it louder, and isn't necessary, but I didn't think it would be this loud). There isn't much, if any, room left to add any other resonators or mufflers so I'm not sure what to do. It isn't too bad if I stay at lower RPMs but I can't give it much and it cracks open loud. I guess I will just put-put grandpa style when I'm in town. :violin:

[MOTOWN]

My entire setup right now is a 5.0 stroker with a Trilogy going through SW headers to the Vibrant Performance resonators (10" long by 4.5" x 6.75" oval) to an H-pipe to Magnaflows (18" case) to resonator delete tips (I wanted to put the original tips on but the resonator brings the pipe size down to 2.25" I think, not sure if that would be a bad idea). The exhaust is 3" until after the mufflers it's 2.5" (3" probably makes it louder, and isn't necessary, but I didn't think it would be this loud). There isn't much, if any, room left to add any other resonators or mufflers so I'm not sure what to do. It isn't too bad if I stay at lower RPMs but I can't give it much and it cracks open loud. I guess I will just put-put grandpa style when I'm in town. :violin:

Im surprised its still too loud, i have the 5X14" round Magnaflows in place of the cats , and the the big 5X11X29 Magnaflows on a full 3" exhaust , it's fairly quiet until you get on it.

[LG88]

So I read on this thread, I get mixed reviews on the figment of SW exhaust system. If you guys had to redo it all again, would ya go with the SW exhaust or a custom one by a local muffler shop?

[Cougar_Marauder]

If I could do it again I would go with custom made 2.5". The SW headers are fine but custom made ones probably are too...