GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Are you happy with stock exaust?

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Old 10/24/05, 04:54 PM
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Originally posted by RandyB@October 23, 2005, 12:32 PM
I love the sound of the stock mufflers - Ford did a great job. If I do anything, I'll add Kooks longtubes and high-flow cats. I think they would sound even better then. I going to wait for now - I'd like to see a set on someone's car before I spend the bucks.

I like those MRT tips, but is there a way to index that huge clamp to the top side where it would be less visible? I guess they could be welded...
Randy, my MRT clamp hardware is on the top side and hardly visible through the valance. As you mentioned, they could also be welded on though.

[attachmentid=36956]
Old 10/24/05, 07:30 PM
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Originally posted by BLT2RUN@October 24, 2005, 4:57 PM
Randy, my MRT clamp hardware is on the top side and hardly visible through the valance. As you mentioned, they could also be welded on though.

[attachmentid=36956]
Thanks for posting that pic - I may just have to go that route as well. They look nice - just the right size.

Old 10/25/05, 05:36 AM
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Another vote here for the stock pipes.

IMO, it ain't all that quiet. It definitely got louder after the JLT, tune and 4.10's. Being that the only route to more HP is big $$ longtubes, I'll be sticking with stock.
Old 10/25/05, 07:24 AM
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Originally posted by Route 66@October 24, 2005, 1:28 PM
Great, here I go again. Rondosa, are you sure it doesn't sound more like a "deeeep", "HUMMMMMEEERRRR" noise. Paint me a different picture I can imagine.

cute, very cute.



but no, i'm sure it's a "hummmmmmmm" vs. "hummmmmmmmmerrrrr".
Old 10/25/05, 08:09 AM
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I actually like the stock exhaust sound. I am sticking with it, just need to get some good looking tips though, I don't like the way the stock pipes look out the back, but other than that I'm happy.
Old 10/25/05, 01:36 PM
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The MRT tips are the only way to go if you want to keep your stock exhaust, like i do.
Old 10/25/05, 01:47 PM
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How long are the MRT tips ?
Old 10/25/05, 01:57 PM
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I like the SLP tips... you can adjust them so that they stick out 0" all the way to around 3".
Old 10/25/05, 02:11 PM
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The Drone that you hear is the natural resonant frequency of the exhaust pipe due to its particular length. It also hapens to usually be linked with an H pipe on the ford HO Motors with the 13726548 Firing order. It usually resonates @ 1900 - 2100 RPM's the loudest under medium to High loads. But mostly only heard with a chambered or welded type muffler that dosnt use any type of packing. If you put an X-Pipe on the car it will cancel out more of the lower exhuast tones helping to rid of that "Drone" sound and also quieting the exhuast. But the Buy product of the X - pipe by cutting out some lower tones makes the sound raspier and higher pitched. Some people call this a "Racey" sound which has a more Foreign Car sound. I think that by putting on and X-Pipe you get rid of the true "Muscle Car Sound" that mustangs are supposed to have. I have Spintech Mufflers and they sound big and bold with a deep muscular sound. If I were to add an X-Pipe it would get quieter and I would lose the deep tone. To each his own.... I preffer to live with the drone. I will be Dynamatting my trunk to cut down on the sound from the mufflers in the interior of the car.
Old 10/25/05, 04:04 PM
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Originally posted by acadian@October 25, 2005, 10:00 PM
I like the SLP tips... you can adjust them so that they stick out 0" all the way to around 3".
How long are the SLP tips?
Old 10/25/05, 04:37 PM
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but maby im wrong
Old 10/26/05, 07:59 AM
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with the cost of these exhaust systems, and the minimal gains under 400hp...I thin I'll just get an x pipe and tips for the stockers and be done with it....
Old 10/26/05, 08:09 AM
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Does anybody know the length of these exhaust tips that are mentioned above?

Both websites only show pics and don't give length.

SLP = ?
MRT = ?
Old 10/26/05, 08:35 AM
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I'll measure them next time I go out to the car, but the SLP tips are close to a foot long. They are monsters. You can only adjust them to stick out about 3-4 inches though. But that's plenty.
Old 10/26/05, 08:44 AM
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got a link forthe slp tips...couldnt find em on their website..
Old 10/26/05, 10:56 AM
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Did a little search on TMS, and found these pics of the SLP Loudmouth tips...
Old 10/26/05, 10:57 AM
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And one more...
Old 10/26/05, 12:48 PM
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doesnt look like those would work on stock cans...

I just bought mine trough MRT...and some hood struts, too!
Old 10/26/05, 02:39 PM
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Originally posted by Rondosa@October 24, 2005, 10:22 AM
it would be hard to capture the sound accurately on video/audio recording - you have to experience it first hand to see if it's too loud for you to handle. it just sounds like a deep "HUMMMMM" noise...picture a tuba or basoon playing a constant low note. it just resonates inside the cabin - the sound/level etc depends on your car and your exhaust system. it only happens within a certain RPM range which means that if it happens to be during the range for your highway driving (i.e. 1800-2000 rpms in 5th gear at 70mph), then it's constant and annoying (unless of course you accelerate or slow down).

most of the time though for city driving you travel through the sound quickly as you accelerate and shift past it.

make sense?
Thanks for that nicely detailed explanation, Kristina.
That helps put everything in perspective.
Old 10/26/05, 08:34 PM
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just got my flowmasters.....puttin' them on this weekend...i'll post my opinion sunday!


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