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Old 05-13-2007   #1
 
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Default good mufflers, high flow, low noise?

Hey guys, I was wondering if you know any performance muffler brands/types that don't require quadrupole sound proofing LOL!. running a header and cat-less, my magnaflow is just crazy loud!

-New system in the works
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Old 05-13-2007   #2
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Default Re: good mufflers, high flow, low noise?

Magnaflows (NOT Magnapacks) are one of the quietest performance mufflers out there really. But nearly any performance muffler is going to be loud considering you're running headers and catless (I'm guessing crossover pipe, H or X?). Catted pipes are getting good enough that they don't really hurt Power compared to non-catted pipes, and they're a bit quieter. You running long tube or shorty headers?

Anyway, you wouldn't see much of an improvement with other mufflers unless you went back to stock or put the stock crossover pipe/converters back in place or went to a catted X or H pipe. Straight through packed designs like Magnaflows, perhaps Dynomax, the Bassani Quiet Thunders aren't bad, some of the Borla designs are pretty quiet, and don't drone as bad as chambered mufflers like Flowmasters or the MACs.
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Old 05-14-2007   #3
 
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Default Re: good mufflers, high flow, low noise?

Thanks, its a long tube, Think I'll just add a big resonator, and hope for the best

-New system in the works
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Old 05-14-2007   #4
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Default Re: good mufflers, high flow, low noise?

The big long tube is killing you, it's resonating and could actually be harming performance, big resonance is far from free flow

Where does the exhaust exit the vehicle?

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Old 05-14-2007   #5
 
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Default Re: good mufflers, high flow, low noise?

What Car is this and what size exhaust? As stated, running an X or H pipe if duals?
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Old 05-14-2007   #6
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Default Re: good mufflers, high flow, low noise?

x2 on the Magnaflo's

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Old 05-14-2007   #7
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Default Re: good mufflers, high flow, low noise?

exiting straight back behind the rear axle will get the sound further behind you, but as said above your only hope is putting the cats back on and maybe a few other mods. i LOVE my magnaflow. minimal drone and only bellers when i'm burning too much gas or when the temp and humidity is just right.

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Old 05-14-2007   #8
 
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Default Re: good mufflers, high flow, low noise?

I guess my Stillen wouldnt apply here...

X3 on the Magnaflow...Of the several that Ive done or used it has been by far one of the least noisy.


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Old 05-14-2007   #9
 
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Default Re: good mufflers, high flow, low noise?

I've found Dynomax Super Turbos to be really quiet too, but when picking a turbo-style muffler you need to pay attention to their rated flow and make sure it's enough for the demands of your engine.
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Old 05-14-2007   #10
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Default Re: good mufflers, high flow, low noise?

Resonance can also stem from a long portion of straight pipe, like the mid 80's to early 90's mustangs had. Was the main reason that they sounded "good" from the factory but most aftermarket exhaust systems got a lot of resonance, so long and straight is not always good.

I have to vote for the magnaflow as well, no cat makes things a ton louder regardless of the muffler chosen. What type of Car would help as well, I have run most "types" of performance cars so I might be able to help.

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Old 05-14-2007   #11
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Default Re: good mufflers, high flow, low noise?

hmmm, nobodies reccommending old school cherry bombs, like I got?

I think they sound just right.
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Old 05-14-2007   #12
 
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Default Re: good mufflers, high flow, low noise?

You can try to use a Dynomax bullet as a resonator in place of the cat as well, helps take a little of the "edge" off before the muffler. Moroso Spiral Flows also work well for this and are a little quieter even, but it changes the sound and makes it very unique. Some people like it, others don't.
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Old 05-14-2007   #13
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Default Re: good mufflers, high flow, low noise?

Quote:
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hmmm, nobodies reccommending old school cherry bombs, like I got?

I think they sound just right.
Lol, I just saw the other day Cherry Bomb makes other styles of mufflers other then the glass-pack now.

I always wanted to try one of these:


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Old 05-14-2007   #14
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Default Re: good mufflers, high flow, low noise?

Corsa for life. I have a titanium catback - it's pretty bad ass. they use cancellation to silence resonance. Dont know how many cars they are available for.

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Old 05-14-2007   #15
 
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Default Re: good mufflers, high flow, low noise?

Hey guys, its on a focus SVT, the long tube is the stock header, equil length tubes, quite a nice piece. 2.25" pipe straight back, exits behind the car. Damn 4cyl buzzing and poping LOL. I think I'll just throw a nice cheap cherry bomb glass-pack on it, (in addition to the muffler) and see how it sounds then. Thanks for the advice.

-New system in the works
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Old 05-14-2007   #16
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Default Re: good mufflers, high flow, low noise?

I will probably be doing a custom exhasut for my Car with Magnaflow exhast parts as well. I know some people who have done the same and are happy. All the pieces have that lifetime waranty so how can you go wrong. haha
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Old 05-14-2007   #17
 
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Default Re: good mufflers, high flow, low noise?

I have a Racing Beat and it's pretty nice. Running 2.5" with a 4-1 header and a catless midpipe. It's loud when I get on it but no drone on the highway or no pops. I think they might just Build for Mazdas though...eventhough we both have Ford products.
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Old 05-14-2007   #18
 
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Default Re: good mufflers, high flow, low noise?

Quote:
Originally Posted by ArcL100 View Post
Lol, I just saw the other day Cherry Bomb makes other styles of mufflers other then the glass-pack now.

I always wanted to try one of these:


-aaron
I have that muffler. It's pretty quiet, especially at idle. When I'm on the gas, there is a slight drone, but not enough to rattle your ears. At full throttle my intake is way louder. It is definitely quieter than my friends flowmaster with the same car. Also has a nice deep burble.
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Old 05-15-2007   #19
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Default Re: good mufflers, high flow, low noise?

Quote:
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I have that muffler. It's pretty quiet, especially at idle. When I'm on the gas, there is a slight drone, but not enough to rattle your ears. At full throttle my intake is way louder. It is definitely quieter than my friends flowmaster with the same car. Also has a nice deep burble.
I can't stand flowmasters, I guess it comes from hearing every "rich kids" mustang back in the late 80's / early 90's.

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Old 05-15-2007   #20
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Default Re: good mufflers, high flow, low noise?

Quote:
Originally Posted by B-Squad View Post
I have a Racing Beat and it's pretty nice. Running 2.5" with a 4-1 header and a catless midpipe. It's loud when I get on it but no drone on the highway or no pops. I think they might just Build for Mazdas though...eventhough we both have Ford products.
I put the stock Mazdaspeed axle back on the Protege5, I think its made by RacingBeat. It is great around town but at 70mph it resonates like crazy. I just ordered some Raammat and plan to coat the rear of the hatch to see if it will help.


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Old 05-15-2007   #21
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Default Re: good mufflers, high flow, low noise?

Quote:
Originally Posted by KingSVT View Post
Hey guys, its on a focus SVT, the long tube is the stock header, equil length tubes, quite a nice piece. 2.25" pipe straight back, exits behind the car. Damn 4cyl buzzing and poping LOL. I think I'll just throw a nice cheap cherry bomb glass-pack on it, (in addition to the muffler) and see how it sounds then. Thanks for the advice.


I currently have a Magnaflow muffler on my Passat w/ an off the shelf glasspack from a muffler shop, it's 16" long but I'm also turboed and on the stock CAT, otherwise the sound is great never loud when not needed, but sounds PERFECT when I get on it, sounds like a European Car should.

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Old 05-16-2007   #22
 
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Default Re: good mufflers, high flow, low noise?

Sure fire way to make it quieter and not lose any power... add a turbo!

I'd go for putting a catalytic converter back on. The high flow ones like Random Tech won't hurt your output any more than an extra resonator, and your exhaust won't smell as bad anymore.

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Old 05-16-2007   #23
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Default Re: good mufflers, high flow, low noise?

Quote:
Originally Posted by chad View Post
I can't stand flowmasters, I guess it comes from hearing every "rich kids" mustang back in the late 80's / early 90's.

Chad
in my case every older truck has a blowmaster on it. i'll stick with magnaflow and might consider borla next time around. my magnaflow will have to rust out completely before that happens tho.

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Old 05-16-2007   #24
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Default Re: good mufflers, high flow, low noise?

Does Apexi make the World Sport2 for the Focus? That's a quiet one.

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