10-16-2022, 07:52 PM | #1 |
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$188 downpipe? For Real?
Here is a catless downpipe that I came across
https://www.maxpeedingrods.com/produ...%20%26%20Parts Only obvious thing is the construction is 201 stainless vs. the nominal 304. 201 is cheaper than 304, but I have seen it in exhaust applications. Anyone have any experience with this DP or 201 stainless in a downpipe application? THANKS. |
10-17-2022, 08:24 AM | #2 |
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I would not use any exhaust product with 201 construction.
Im not sure where you have seen it being used, but I'm not familiar with any good brand that uses 201 on any BMW exhaust application.
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WolfGTI737.00 |
10-17-2022, 09:04 AM | #3 |
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10-17-2022, 02:43 PM | #4 | |
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Quote:
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10-17-2022, 02:59 PM | #5 | |
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Don't expect any real gains between the 4 and 4.5 unless you have larger turbos.
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10-20-2022, 07:35 PM | #7 |
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10-24-2022, 03:32 AM | #8 |
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Pure800 4inch Ok?
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10-24-2022, 11:45 AM | #9 |
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Yeah 4 inch pipe is plenty. No matter what size Downpipe you get it tapers down to connect to the smaller exhaust piping. So unless you have a full custom exhaust you won't see any huge differences.
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10-24-2022, 06:42 PM | #10 |
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Devil's advocate here: Doesn't going from the header diameter to larger diameter back down to a smaller diameter to the midpipe (if catless) potentially reduce air flow?
Flow speed reduces in larger openings which then can result in becoming turbulent which impedes flow. It feels that a lot of those options are pure marketing. I could see potential benefits if it went to a cat since it would be less restrictive. Just asking.... |
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10-26-2022, 03:59 PM | #11 |
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Only thing you really gain would be a quicker turbo spool. Going from a large diameter and then having an aggressive reducer to match the stock exhaust size would not help Hp.
4- 4.5 inches is more than enough.
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10-26-2022, 05:07 PM | #13 |
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