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Anyone put Flowmaster mufflers on their 4.2?

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Old 11-25-2013, 07:25 PM   #1
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Default Anyone put Flowmaster mufflers on their 4.2?

Hey everyone,

I have an 07 A8 4.2 and have been thinking about upgrading my mufflers. I am a fan of the Flowmaster and have had them on my trucks & muscle car with great performance & sound. Anyone here have them on their A8? I only want to change out the stock mufflers, NOT a full cat back system. Any feedback would be great. Thanks
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Old 11-26-2013, 04:09 AM   #2
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I did end up doing a cat-back exhaust from magnaflow. Good sound not as good as Flowmaster but just right for this car, not too loud. What I have notice is, I pick up some MPG to my surprise. I now get 26-27 MPG on the highway. I use to get around 24-25 MPG. You can also get it for a lot less that is listed. I did.
Here is a link:

http://forums.audiworld.com/showthread.php?t=2853561
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Old 11-26-2013, 11:44 AM   #3
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Trust me on this, if there was any drone it would be off the first day I put it on. It as a nice sound to it not to loud. With a car like this it is hard to find the right sound and when I got it, to be honest in my mind I was thinking it was going to come off, but so far I like it. The set up is the same as the stock factory exhaust. All Magnaflow did was to copy the factory set up with a better x-pipe, better resonator and better flowing mufflers, with a bigger diameter piping. One x-pipe (cross-over)into a resonator though two muffler. The fitment is the same as OEM. All hanger are in the same location. I have to say I am real happy with the fitment and sound of the system. Also can't beat the life time warranty.
Here is a link to Magnaflow site.
http://www.magnaflow.com/02product/s...ayproducts.asp

click on the image to get a better picture. Also all dimension are on there site.
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Old 11-26-2013, 11:08 PM   #4
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Viper04, How much was that Magnaflow setup that you installed? It looks nice being stainless and it probably cost a lot. I'm leaning on just chopping the stock mufflers off and welding in 2 Flowmaster mufflers or maybe even the Magnaflow.
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Old 11-27-2013, 07:55 AM   #5
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Originally Posted by SoCalJ View Post
Viper04, How much was that Magnaflow setup that you installed? It looks nice being stainless and it probably cost a lot. I'm leaning on just chopping the stock mufflers off and welding in 2 Flowmaster mufflers or maybe even the Magnaflow.
I paid a little over $600 for the system. I sent a offer on E-bay and seller took it.
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Old 11-27-2013, 08:05 AM   #6
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Quote:
Originally Posted by ZiggyV8 View Post
All Magnaflow did was to copy the factory set up with a better x-pipe, better resonator and better flowing mufflers, with a bigger diameter piping. One x-pipe (cross-over)into a resonator though two muffler. The fitment is the same as OEM.

That is currently sort of my plan. A modified version of standard. cheers for link and post but couldnt find anything

Couldn't open a magnaflow 4.2 specific link that gave me an exact idea as they seemed to be a generic product shot. It didnt show a x-pipe or a performance version of the 2 in/2 out muffler located foraward of rear diff.

I think I shall put in the 24" long resonators as believe they will take some drone out, just hope it doesnt take much noise aswell? Have a set of performance muffler I can test with system and if close enough, will probably order a Magnaflow set larger or similar based on test set. There will be no 2 in/out muffler though, have noted some milltek type full set ups still incorparate it?

A true performance version of original would have 2 resonator, an x-pipe a mid mounted muffler and 2 rears. Mine will be minus the mid.

If most are only replacing the rear they should be fine but there are after market bolt ons that include the mid mounted muffler also around $2k.

I will be playing more and my experimentation will save someone in a few weeks once completed. add me to see how my project unfolds.
If you go on there site just look up the Audi 8A exhaust system, all the info should be there.You can also call there tech line for some info. When I called there tech line, they clam some HP increase, what I notice was the better MPG, more than the HP increase.
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Old 11-27-2013, 10:31 AM   #7
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Quote:
Originally Posted by ZiggyV8 View Post
You'll generally need a remap to optimise both, done it and is definitely more power. Economy can't say, I'm giving it the boot too much! I'm Aussie so not calling anyone or ordering kits. Just the cans, local guys can do all the tube work. Do feel that mid muffler sucks a lot of noise. Why mine is louder. Not putting it back but! Just gonna get a larger set of magma flows if next test fit is still to loud?

Sent from my GT-N7100 using IB AutoGroup
I'm just posting the info, I don't work for Magnaflow, just posting my personal experience that's all. Are you doing all the work yourself? That's quite a bit of test fitting.
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Old 11-27-2013, 11:20 PM   #8
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Quote:
Originally Posted by viper04 View Post
I'm just posting the info, I don't work for Magnaflow, just posting my personal experience that's all. Are you doing all the work yourself? That's quite a bit of test fitting.
well I've played with it 3 times so have a spare set of straight thru mufflers sitting around.

They are flanged so can bolt on the rear and take off easy enough.

Endstate: once i fit resonators, tidy some tube work up and cut out old x-pipe i'm 90% done! I am looking at mufflers as we speak!
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Old 11-28-2013, 06:34 AM   #9
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why in the world would you want to ruin the quiet and luxurious A8 that they spent so much money on engineering and perfecting the silence of the ride!! Buy a honda!
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Old 11-28-2013, 08:13 AM   #10
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Quote:
Originally Posted by dripppps View Post
why in the world would you want to ruin the quiet and luxurious A8 that they spent so much money on engineering and perfecting the silence of the ride!! Buy a honda!
Can't. A8 is cheaper. Well, apparently not in Australia.

You guys should be aware that all you can get is a different sound. Even that you can't control. Only way to gain SOME power is to start with headers. Even than it is very difficult to incorporate it in that sophisticated induction system.

Exhaust designers where using electronic models in order to evaluate results before they start welding. Now they are using computer programs for that. Just cut and weld system will definitely work too. You just have to convince yourself that you like the result.

And the last, just the matter of opinion, V8 sound is generally ugly, with exception of flat crankshaft ones. They are in the same league with Harley's and Subaru's. Choppy sound. Like misfire.
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Old 11-30-2013, 05:57 AM   #11
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Quote:
Originally Posted by dripppps View Post
why in the world would you want to ruin the quiet and luxurious A8 that they spent so much money on engineering and perfecting t
e silence of the ride!! Buy a honda!
So true. I have loud cars (not hondas) and they are what they are. One of the original reasons I purchased my s8 was my wife saw this video
and said YES!
I was all for changing over the exhaust to a Milltek configuration. I started driving the car and realized that I no longer wanted the loud car "hey look at me" status. The car gets plenty of head turns already.
I agree that the flowmaster mufflers do sound great (I've had them on several vehicles) and I have a friend that has dynomax on his 05'S4 4.2. To be honest that sounds like a 5.0L Mustang. If that is the sound you are looking for (flowmaster I suspect would be louder) then go for it. I appreciate the quietness that the A8/S8 cabin provides.
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Old 11-30-2013, 08:27 AM   #12
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Two ways to make it sound good. Which one you prefer?



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Old 11-30-2013, 09:50 AM   #13
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Besides being extremely rude you didn't get any of it. All replies are about exhausts. Guys are just not using your kind of language to express their despise of your idea. So let me simplify it for you: everything you are doing to that poor A8 is fake and ultimately ugly. From that ridiculous front bumper to that just as ugly rear spoiler. On the other hand it all goes very well with your language.

P.S. By the way, you didn't start this tread. Why do you have this urge to police it?

Last edited by mishar; 11-30-2013 at 09:59 AM.
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Old 11-30-2013, 06:39 PM   #14
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FYI: Mr. Ziggy's inappropriate posts have have deleted and he has been banned for a month for his unacceptable language and personal attacks (which are not tolerated in the forums). If he returns and continues with the same type of behavior, his banning will become permanent.
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Old 12-01-2013, 12:18 AM   #15
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Default The exhaust sounds are from the engine alloys which can't be duplicated

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Two ways to make it sound good. Which one you prefer?



Italian, German, Japanese cars all have their own exhaust sounds due the their unique engine alloys I believe. I used to have Alfa Romeo GTV6 with the silk ripping sound when accelerating which I loved. Later I bought Ansa muffler for my VW and it didn't come out the same. I read somewhere that the engine head alloys make the throaty exhaust sounds.
The Ferrari engines are famous for their exhaust sounds, love to hear them roar.
Getting older, I like the quietness of the A8 on the city and freeway but still love to accelerate sometimes to hear the throaty sound of the original 4.2 V8 D3. D2 didn't have it.

Cheers,

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Old 12-02-2013, 05:02 PM   #16
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My favorite Formula 1 sound
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Old 12-02-2013, 06:51 PM   #17
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An oldie but a goodie.
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Old 12-03-2013, 03:00 PM   #18
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It's so funny, I had to find some F1 sound for her to sync with the "Minion" voice... :-)

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Old 12-03-2013, 10:24 PM   #19
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I will have to agree about the luxury and comfort being compromised when trying different exhaust setups. My kids alway fall asleep comfortably on the freeway. The interior of the A8 is very quiet on the road and even with the stock exhaust, when pushed hard still sounds aggressive.

itooz, that cabin video looks like the 405 freeway that I'm stuck in everyday.

So now I'm torn. Keep the stock setup? or keep researching for mufflers?
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Old 12-04-2013, 03:57 AM   #20
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Quote:
Originally Posted by SoCalJ View Post
I will have to agree about the luxury and comfort being compromised when trying different exhaust setups. My kids alway fall asleep comfortably on the freeway. The interior of the A8 is very quiet on the road and even with the stock exhaust, when pushed hard still sounds aggressive.

itooz, that cabin video looks like the 405 freeway that I'm stuck in everyday.

So now I'm torn. Keep the stock setup? or keep researching for mufflers?
Due to the fact Audi did a good job on the A8 interior insulation the sound is about the same.
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Old 12-04-2013, 03:57 AM
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