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2010 2011 BMW 5 Series Forum F10 VRSF Catless Downpipe Exhaust Leak |
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07-17-2018, 12:41 AM | #1 |
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VRSF Catless Downpipe Exhaust Leak
Hey guys, brand new to the forums and modding.
Just installed a catless dp today on my f10 535i. Install went pretty smooth, other than a leak I can't seem to get to seal up. The leak is coming from the union between the dp and midpipe. I tried reseating the midpipe multiple times, as well as trying every position for the band clamp. I have tightened the clamp as tight as it goes. It seems to be coming from where the midpipe is slotted to allow it to crimp over the dp. Has anyone had a similar leak or know a solution to this? I want the option to change the dp again so I don't really want it welded on. Let me know what you guys think. |
07-17-2018, 11:48 AM | #2 | |
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07-18-2018, 10:22 AM | #4 |
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I have a stage 2 MHD tune that I was driving with before the dp install, so I don't feel much of a difference. I do notice that the turbo sounds really nice and spools much quicker (used to be ~450rpm for it to spool up now its ~300), and exhaust is louder on start up. In the cabin there is no difference, but maybe when I get that leak fixed it will increase the sound in the cabin. With your muffler deletes it should sound really nice!
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07-18-2018, 10:23 AM | #5 |
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07-18-2018, 06:48 PM | #7 | |
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07-18-2018, 10:16 PM | #8 |
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I understand what you are saying, but the midpipe is completely seated over the downpipe. There is no more room for it to go. I think they are just slightly different shaped which causes there to be a small gap for air to leak out. I am taking it to a shop Friday to see if they can weld on a new midpipe connector and use a larger band clamp to get a better seal.
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07-18-2018, 10:44 PM | #9 | |
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07-19-2018, 11:04 AM | #11 |
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I was thinking about that. Problem is, its a male/female connection vs the bolt on style with the donut gasket. I don't see how I could apply the sealant to form a proper gasket since the pieces are sliding together vs bolting together.
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02-05-2019, 04:42 PM | #12 | |
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What did you do to repair this. I have the same problem |
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02-05-2019, 09:39 PM | #13 |
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Well I guess I'll stay away from this DP when it comes time
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05-17-2019, 07:33 AM | #14 | ||
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05-17-2019, 06:43 PM | #15 | |
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Others on the X3/X4 side also don't seem to have fitment issues with the DP, I wonder what difference causes this issue on the 3/4/5 series side of things.
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05-17-2019, 07:29 PM | #16 |
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I have vrsf downpipe on my 535 and it sits perfectly.
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05-17-2019, 07:29 PM | #17 | ||
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05-17-2019, 09:37 PM | #18 | |
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05-20-2019, 04:23 PM | #19 | |
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Edit: According to realoem it's only really different because of mounting brackets. I love how BMW does this because it never makes any sense to me. Has to be pretty expensive creating all these variants of the same part. X3/4: http://www.realoem.com/bmw/enUS/show...diagId=18_0921 F10: http://www.realoem.com/bmw/enUS/show...diagId=18_0862
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05-23-2019, 06:59 AM | #20 |
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Dang this thread is ancient. We've revised this product twice since this post was originally made in order to ensure perfect fitment each and every time.
I apologize greatly for any inconvenience anyone may have experienced. During the first batch of this product release we addresses the one issue with product and that was years ago. We haven't had a fitment issue since but if anyone is struggling with their install, please feel free to e-mail, PM or DM us with your order number and we'll be sure to square you away. The latest revision of this pipe is based a 3d scanned model of the OEM downpipe and for QA we also use an old fashioned jig which is also based on the the OEM downpipe in order to ensure perfect fitment each and every time. Anyone with any issues, please shoot over an e-mail or PM and we'll be more than happy to assist. |
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05-23-2019, 03:10 PM | #21 | |
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