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Old 01-19-2016, 02:03 PM   #1
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New Exhaust for the 03 GT need advise

I'm looking to get the exhaust redone on my GT. I can't decide between H or X pipe, and Magnaflow or Flowmaster. I'm sure several of you have different combinations of each. I'd love to hear your personal preferences.
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Old 01-19-2016, 02:08 PM   #2
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Back in the day I had Flowmaster on my 03 GT. It sounded really good but it was kinda raw in terms of engineering(especially back then.) Sooo much drone!

I had looked at Magnaflow and isnt a bad option at all. Most of the Magnaflow's I checked into sounded a tad more aggressive then flowmaster imho.

Don't be afraid to look into Corsa or Borla as well. Both make great products that are drone free.

PS I have always liked the rumble of the H-Pipe
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Old 01-19-2016, 02:11 PM   #3
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New Exhaust for the 03 GT need advise

Off-road H with any flowmasters. A friend has that set up with 40 series, sounds awesome. That's what I'd do.

Pick your poison.
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Old 01-19-2016, 04:37 PM   #4
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oh I didn't mention that I bought the car without cats and don't plan to put them back on.... does that change the opinions already posted?
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Old 01-19-2016, 07:16 PM   #5
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I had the Pypes off road H with the SLP Loudmouth catback. Way too loud and not in any sort of good way. Replaced the SLP'S with Flowmaster original 40's and couldn't be happier. I don't understand why so many people have issues with droning. I've had super 40's, super 10's and currently the original 40's with no drone issues. That was in a coupe and my current vert. Most of my mileage is highway as well. I did get a nasty drone with the Loudmouths.

Side note, the Mac prochamber is an amazing thing. I loved mine with the 10's, and decided to get another one for my current setup.

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Old 01-20-2016, 05:20 AM   #6
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oh I didn't mention that I bought the car without cats and don't plan to put them back on.... does that change the opinions already posted?
Slightly. The factory midpipe is an h-pipe so that makes the midpipe choice easier. You can buy a catback first and see how you like it, if you don't then you can just buy an off road x-pipe.

I'm not a fan of Flowmasters due to how bad they drone and how popular they are. I Personally I went Magnaflow with a Bassani X-pipe on my old GT and loved it.
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Old 01-20-2016, 07:28 AM   #7
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UPR catted X pipe and Magnaflows if you are between X and H and Flows and Mags. Its not even close. Like seriously...


As far as X vs H, its purely a sound thing. X is a little raspier and will never sound good with a chambered muffler like a Flowmaster.

Also Flowmasters are also known as "dronemasters" for a reason...




There is also Borla, Bassanni, Dynomax, Spintech, etc... etc...


You'll see Pypes offering stainless stuff at a price at or lower than everyone else as well. Just be aware that they use the cheapest Chinese junk stainless steel known to man. There are enough ppl that run them with success but... you get what you pay for.


In all honesty, threads like this are kinda useless because everyone has their own idea of what sounds best. Get to a car show if you can or if not get on youtube and listen to all the combinations you can.
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Old 01-20-2016, 07:30 AM   #8
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oh I didn't mention that I bought the car without cats and don't plan to put them back on.... does that change the opinions already posted?

Is it an H, still, or X pipe? H with Flowmasters is my pick, still.


Pick your poison.
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Old 01-20-2016, 07:38 AM   #9
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oh I didn't mention that I bought the car without cats and don't plan to put them back on.... does that change the opinions already posted?
There probably aren't any emissions laws in MS but just be aware that no cats=federal offense so if a cop is having a bad day or you roll through a town where they are strict on noise you can get impounded.
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Old 01-20-2016, 10:36 AM   #10
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My 2004 GT has stock exhaust manifolds, pypes off-road H pipe, Flowmaster Super 10 series, and 2.5" tailpipes with stock tips.

Here she was on the dyno last year.

https://youtu.be/_M74OffhdB0

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Old 01-20-2016, 11:56 PM   #11
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Just go full off road x pipe with lm1 lol.

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Old 01-21-2016, 02:28 PM   #12
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UPR catted X pipe and Magnaflows if you are between X and H and Flows and Mags. Its not even close. Like seriously...


As far as X vs H, its purely a sound thing. X is a little raspier and will never sound good with a chambered muffler like a Flowmaster.

Also Flowmasters are also known as "dronemasters" for a reason...




There is also Borla, Bassanni, Dynomax, Spintech, etc... etc...


You'll see Pypes offering stainless stuff at a price at or lower than everyone else as well. Just be aware that they use the cheapest Chinese junk stainless steel known to man. There are enough ppl that run them with success but... you get what you pay for.


In all honesty, threads like this are kinda useless because everyone has their own idea of what sounds best. Get to a car show if you can or if not get on youtube and listen to all the combinations you can.
Once again I find myself agreeing with Scotty 100%.
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Old 01-21-2016, 03:33 PM   #13
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**** I don't even agree with me 100%...
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Old 01-21-2016, 03:54 PM   #14
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**** I don't even agree with me 100%...
Its only been twice now...don't get a big head over it.
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Old 01-22-2016, 09:39 AM   #15
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I'll second the opinion on the Pypes. Super low quality. Mine has been on there just a month or two and are already looking like garbage. It's good motivation to stick with the original plan and get a Prochamber under there.

But exhausts are 100% subjective. Check out your local club. I'm sure you'll find several different setups. I'm sure they will let you do a ride along too so you can also hear how it sounds from inside the car. Then just pick a setup you like best.

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Old 01-24-2016, 11:19 AM   #16
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I think Scotty said it best a few post ago. The topic is extremely subjective. However one benefit of these threads is to tell you what not to use, like straight pipes!

Best bet is hear cars in person or grab some good speakers and crank up the youtube videos. I've always thought Magnaflow Magnapacks with an o/r h pipe sounded good on the 2v's.
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