04-03-2019, 10:49 PM | #1 |
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Question For You If You Have Replaced Your Downpipe?
Question For You If You Have Replaced Your Downpipe? Did you replace any related parts during your installation such as a gasket, 0-ring, clamps, nuts, bolts, etc? I usually replace parts like this especially if they are under harsh conditions like the exhaust system. Please let me know your experience so that I can buy parts to have ready during my downpipe installation? Any advice is greatly appreciated!
Here's the related parts list from top (engine) to bottom (midpipe): 1) Pre-Converter O-Ring (metal gasket) 18-30-7-553-601 $17.72 2) Pre-Converter Clamp 11-65-7-620-508 $20.32 NEW DOWNPIPE- with two welded brackets that each have a bolt hole Nuts & Bolts?- There are two brackets on the downpipe, each with a hole. There is a bracket with matching holes, called the Converter & Pipe Bracket (18-32-7-643-425 $39.73) that the downpipe must bolt to. A dealer told me that the nut is an M8 (18307525607 $1.27) but I haven't been able to determine what the bolts are. Any ideas? I assume these nuts and bolts might have to be replaced and I don't know what size/part# bolts to order. 4) Converter & Pipe Retainer Ring (Bottom Clamp) 18-30-7-620-349 $26.70 A dealer tech told me that these bottom clamps often don't come off and go back on very well so he makes sure that he has a replacement handy. |
04-03-2019, 11:32 PM | #2 |
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We recommend replacing the gaskets with downpipes, most will be fine re-using the stock gaskets if they are still in good condition
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04-04-2019, 08:39 AM | #3 |
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You need one gasket and two clamps to do it properly. Looks like you linked the proper ones.
As Mike said, you may find that your clamps or gaskets come off easy and are in good, reusable condition - like mine were. But you have no way of knowing until its two late. |
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04-04-2019, 09:05 AM | #4 | ||
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04-04-2019, 09:10 AM | #5 |
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I did not need any additional bolts or nuts at all. My down pipe came with brackets and bolts in the exact same position as OEM. I re used factory nuts so I cannot comment on size.
Someone else may be able to but I dont want to steer you wrong. |
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04-04-2019, 09:21 AM | #6 | |
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04-04-2019, 10:56 AM | #7 | |
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04-04-2019, 02:35 PM | #9 |
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Replace gaskets as a minimum imho. i did gaskets and clamps. May as well just do it right since you're in there. PLUS you're in NJ, the roads are horribly dirty.
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04-04-2019, 02:49 PM | #10 | ||
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All the Fabspeed photos I've seen just have holes. I was told by dealer that the nuts are M8. So I'm trying to find out how long of a bolt I should buy. Just stopped at Lowes and they have stainless steel M8 bolts in 20mm long and 30mm long. (25.4mm= 1 inch). Do you think one of those two sizes will work? How do you like your Fabspeed catted? What differences did you notice? |
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04-04-2019, 02:56 PM | #11 |
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i forget, it was so long ago. Do remember i had the stock clamps and gasket and so we needed nothing else. You should be fine. As for feel, etc., it was the very last thing done to the car, which already had all the other stuff you see in my sig. Easily felt the added push so well worth it imho plus no CEL and no smell either.
Oh yeah, no drone, kept the stock pipes downward. Car is relatively quiet and fast. Louder is not always faster... plus i love sleeper cars.
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04-04-2019, 03:37 PM | #12 | ||
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04-04-2019, 05:37 PM | #13 |
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In case it helps....
This is exactly what I bought in addition to the actual down pipe for my N26. Nothing more, nothing less. Edit: pic not loading? |
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04-04-2019, 05:49 PM | #14 | ||
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12-02-2019, 11:34 PM | #15 | |
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These are the correct parts for 2015 335i EWG RWD 8AT? I have seen these posted on several other threads. |
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12-03-2019, 12:23 AM | #16 | ||
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You can doublecheck the part numbers by giving your VIN number to GetBMWParts dot com where I ordered my parts. And you can also check on realoem dot com. Good luck! |
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12-03-2019, 12:45 PM | #17 | |
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https://f30.bimmerpost.com/forums/sh...ht=18307606136 VRSF also shows that 18307606136 is for the 4'' clamp which differs from what you said. https://www.vr-speed.com/vrsf-4-turb...8-n20-n55.html At this point i am just going to go with the other threads that show 18307606136 for the 4'' EWG turbo to DP clamp and 18307581970 for the corresponding gasket. Those are also discussed here: https://f30.bimmerpost.com/forums/sh...ht=18307606136 |
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12-03-2019, 12:50 PM | #18 |
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When I replaced my stock downpipe with a vrsf catless I really used the oem gaskets and everything and it was good.
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12-03-2019, 01:02 PM | #19 |
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