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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 12-24-2020, 06:13 PM   #1
sr vegas 240
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Exhaust/Fabrication question

So im building an exhaust on my s13 turbo ls and I got a flex pipe that I want to put in it. The issue is it will absolutely not fit anywhere on the downpipe. My question is if I put it in the axle back like right after the trans will it even do anything? Any fabricators/engineers that might be able to answer this?

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Old 12-25-2020, 06:23 AM   #2
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Typically the flex pipe helps keep the manifold or downpipe from cracking, however, some people don't use them if the exhaust is mounted rigid enough.
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Old 12-25-2020, 01:00 PM   #3
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Ideally, you have the flex mounted in the DP. However, there are plenty of aftermarket pieces that do not utilize flex sections. Omit it for now and see if it is necessary before trying to make it work. Also, they have flex pieces that have pretty short Lang lengths for tight areas.
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Old 12-25-2020, 04:05 PM   #4
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I have a flex in the crossover pipe and I will put this one in the axle back even if it helps a bit. Mine is kind of bulky its 4"x6". I see the vibrant slim on but still its 3"od but id goes down to 2.72"
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