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Old 06-19-2015, 11:38 PM   #1
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Question about exhaust install

So I just got done installing a flowmaster outlaw catback exhaust on my 2015 Mustang GT. The exhaust requires you to cut off the downpipe from the catalytic c onverter about 11 inches from the cat. So I ended up cutting it a little unevenly and in the end cut about an inch or so too much.

The band clamp I believe it's called to join the downpipe from the OEM exhaust and the H pipe from the flowmaster is apparently just suppose to join the two pieces together, the one piece is not suppose to slide into the other peice or anything. I ound that odd, but when I called flowmaster they assured me this was the correct way and the band clamp is made ot be used that way.

So like I said, I cut a little too much and have about a 1 inch gap between the OEM downpipe and the flowmaster H pipe. The band clamp fit over and covered everything perfectly, so I don't think there should be an issue with this. After all, the two pipes were not meant ot slide into each other, the band clamp was just to join the two pipes together and the diameter of each pipe is the same. There would never be a perect fitted connection because like I said, the pipes do not go into each other, they just line up and the band clamp connects them. Will there be a problem in my case because I have that one inch gap? The band clamp covered everything with some room to spare, so I don't think it will be any different than if the pipes lined up against each other.

Here are some pictures. PLease comment asd I am a bit worried.
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Old 06-19-2015, 11:55 PM   #2
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The pipes are suppose to touch and get clamped over. You will probably have a pretty gnarly leak
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Old 06-20-2015, 12:25 AM   #3
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Anyone else have any feedback?
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Old 06-20-2015, 12:29 AM   #4
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He's not lying...


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Old 06-20-2015, 12:37 AM   #5
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I thought I was being honest lol
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Old 06-20-2015, 12:42 AM   #6
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The band clamp won't seal it? When cutting the factory down pipes you're never gonna get a perfect cut where it lines up perfectly so there wil bit a bit of space no matter what. I just have a little more than a bit Lol. But the band clamp so covered every ting and when I drove it I didn't hear any leaks
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Old 06-20-2015, 12:45 AM   #7
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Those things can leak even when the pipes meet flush
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Old 06-20-2015, 12:48 AM   #8
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Maybe I can get some exhaust piping and use it to connect the two pipes together. Get something that will fit over both sides...
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Old 06-20-2015, 12:48 AM   #9
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Or just get the same size and weld it in there
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Old 06-20-2015, 05:01 AM   #10
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or just wait to see if it does develop a leak

it's an exhaust leak, it won't leave you stranded.

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Old 06-20-2015, 07:31 AM   #11
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So I think I'm gonna head over to autozone and buy some 3 inch exhaust piping they sell, then just get 4 band clamp and fix it that way other than leaving it how it is. Thoughts?
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Old 06-20-2015, 08:06 AM   #12
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simple enuf
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Old 06-20-2015, 01:26 PM   #13
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So I just ended up going to pep boys and buying two 2 1/4 exahsut pipe connectors and 4 exhaust cmalps, they fit right on to both sides it's all sealed up perectly now.
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Old 06-20-2015, 01:35 PM   #14
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Good, now it's fixed. So you're pleased with the sound I hope...


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Old 06-20-2015, 06:09 PM   #15
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How does it sound?
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Old 06-22-2015, 09:34 AM   #16
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I installed the cat-back MagnaFlow system on my 2015 GT. No cutting of any pipes required. Loosen the two clamps downstream of the cats, slide the entire system to the rear, drop the two supports in back and lower the one-piece exhaust to the floor. The new system replaces the large resonator with an X-pipe, then clamps to the two 3" tibes that feed into the mufflers. Perfect fit.......entire job took less than an hour. 4.5" chrome tips fit nicely in the valence cutouts and the sound is awesome.
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Old 06-22-2015, 01:05 PM   #17
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Here it is


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Old 06-22-2015, 01:24 PM   #18
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Here WHAT is?
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Old 06-22-2015, 04:11 PM   #19
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Sorry guys I thought I uploaded it from my phone but for some reason it didn't work. I will upload it later when I get home
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Old 06-22-2015, 04:42 PM   #20
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Videos have to be uploaded through a third party like youtube
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Old 06-22-2015, 09:50 PM   #21
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Just edited my previous post and the video is now in it.
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Old 06-22-2015, 10:11 PM   #22
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Lol it now says video is private
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Old 06-23-2015, 09:15 AM   #23
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Quote:
Originally Posted by natestang07 View Post
Lol it now says video is private
It's working when I play it...
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Old 06-23-2015, 10:47 AM   #24
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If your that worried have the band clamp completely welded up by a shop or do it yourself if you weld.


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---------- Post added at 03:47 PM ---------- Previous post was at 03:46 PM ----------

If not welded 98% of band clamps eventually leak anyways. I don't know why any one uses them in kits


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Old 06-23-2015, 11:29 AM   #25
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Quote:
Originally Posted by 20prima10 View Post
If your that worried have the band clamp completely welded up by a shop or do it yourself if you weld.


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---------- Post added at 03:47 PM ---------- Previous post was at 03:46 PM ----------

If not welded 98% of band clamps eventually leak anyways. I don't know why any one uses them in kits


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I got two exhaust pipe connected and four u bolt exhaust clamps and just used them to connect the little gap from the OEM downpipe to the Flowmaster pipe. The connecters fit on there snug and I tightened the u bolt clamps right so I think everything should be good now. If for some reason I develop a leak how would I be able to tell because it would be a very small leak? At that point I would just have it welded
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Old 06-24-2015, 05:59 AM   #26
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Only way to know rite now is to have it pressure tested or soaped. If it was me I would just have it welded now and remove all the clamps.


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Old 06-24-2015, 06:50 AM   #27
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Only way to know rite now is to have it pressure tested or soaped. If it was me I would just have it welded now and remove all the clamps.


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I see your point but mostly all exhausts come with clamp connections and they don't leak so I'm just gonna leave it as it.
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Old 06-24-2015, 06:57 AM   #28
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They don't leak? I cud name off 100 cars I've seen with leaky exhaust clamps. Over time bolts loosen up and cause leaks. Not all leaks are annoying loud but a leaks a leak. Up to you though it's your car.


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