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View Poll Results: How should I go about this?
Delete center muffler, add sport muffler 12 85.71%
Stock center muffler, delete rear muffler 1 7.14%
Stock center muffler, add sort rear muffler 0 0%
Other: explained below 1 7.14%
Voters: 14. You may not vote on this poll

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Old 02-24-2012, 06:07 PM   #1
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Making my own exhaust...

I want to make my own exhaust. I'll have a shop bend the pipe and all that, but I want to know what to do. I want a deeper sound, but nothing loud enough to really be noticeable inside the car with the windows up.

I'm thinking of three options.
1. Center muffler delete with sport rear muffler
2. Stock center muffler with sport rear muffler
3. Stock center muffler with no rear muffler

If I delete the center muffler it will be replaced with 2.5 inch straight pipe. What would you do?

My rear muffler is about to bite the dust and the rest looks kind of crappy.

Also, what brand mufflers give the best sound? I'm thinking Thrush because they're cheap and from what I've seen/heard they sound nice.

The car is a 2003 9-5 3.0t V6.
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Old 02-24-2012, 06:32 PM   #2
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I'm in the same boat as you
with my stock exhaust I deleted the mid muffler and I thought it sounded good a lot of rumble on downshifts
then I got a full 3" with two mufflers and it's a deep tone but not loud and no rumble

I think I'll end up going with just a rear muffler and delete the center
I believe no rear will make it very loud
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Old 02-24-2012, 06:51 PM   #3
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I'm leaning that way as well. With a Thrush muffler, it can be done for around $100, which I like.

I don't want to make it too loud because this car is my daily. I have my Mustang to be really loud, and it is.
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Old 02-25-2012, 02:55 AM   #4
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Do the center muffler delete and put a sport muffler in the back. When I was younger and dumber I had a Scirocco 16v that I turned into a nearly unbearable noise maker, I replaced the center muffler with a Cherry Bomb, and deleted the rear muffler. Too damn loud!! The car was obnoxious and at wide open throttle could be herd from very very far away.
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Old 02-25-2012, 09:39 AM   #5
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With my other NG900 I deleted the cat, left the center resonator, and added a sport muffler to the rear and got a great sound. I got quite a few compliments from tuners and muscle guys. It had a good node at WOT and was quiet enough at idle.

Keep in mind the center muffler doesn't do much on my car but if I remember right the 9-5's have a real, large, and fat muffler in the center so I'd ditch that asap and just have the rear muffler. That's usually the best bet.
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Old 02-25-2012, 12:41 PM   #6
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All you should do is replace the mid with a straight pipe and throw on a magnaflow muffler. I wouldn't replace the whole exhaust unless you are upgrading to a 3" system, there's no real need for it, unless you want the car to look perfect or something.
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Old 02-25-2012, 06:07 PM   #7
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All you should do is replace the mid with a straight pipe and throw on a magnaflow muffler. I wouldn't replace the whole exhaust unless you are upgrading to a 3" system, there's no real need for it, unless you want the car to look perfect or something.
Yeah, I'm just doing a cat-back, not a full system.

So, sounds like I'm deleting the center muffler, going 2.5" cat-back to a Magnaflow (?) muffler.

Now, which Magnaflow?
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Old 02-26-2012, 03:16 PM   #8
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5x8 oval I think. The magnaflow's should all be straight through design so you don't have to worry about that. I forget if you need offset/center but center/center should be fine.
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Old 02-26-2012, 03:32 PM   #9
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Where can you buy them cheapest? I'm seeing $100-200 on ebay.
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Old 02-26-2012, 05:44 PM   #10
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Not really sure because I would just have an exhaust shop buy it for me, but I think they go for around $150 or so.
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Old 03-02-2012, 07:18 AM   #11
 
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I had really good luck with a 3'' Borla ProXS. center/offset I think. Very clean sounding with nice burbles on deceleration.
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Old 03-03-2012, 11:36 AM   #12
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I just replaced my stock exhaust, last week, with a magnaflow from the cat back. I added the smallest center rez i could and I think it may be too quiet. The shop buy recommended that I could come back and take out the rear cat. He said it would add a nice sound but without so many off throttle burping (like without a rez).
In regards to the rear cat. does anyone know if it is monitored and if i will have any problems, i.e. cel's?
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Old 03-03-2012, 11:45 AM   #13
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before I gave my 9-5 to my bro, the rear muffler rusted and I welded in straight pipe but kept the center resonator. Its not loud at all but has a low grumble at idle you cant even hear it with the windows up. and a real deep tone when you go WOT.
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Old 03-12-2012, 11:18 AM   #14
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What do you guys think about a dual exhaust? I might be able to get this done VERY cheaply....
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