01-08-2013, 01:44 PM | #45 | |
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01-08-2013, 01:47 PM | #46 | |
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The 1M mid pipe with secondary cats is over 2,100 euros!
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01-08-2013, 02:06 PM | #47 |
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01-08-2013, 02:09 PM | #48 | |
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Yea... buy some N55 mid pipes.
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01-08-2013, 02:21 PM | #49 |
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01-08-2013, 03:11 PM | #50 | |
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http://www.1addicts.com/forums/showthread.php?t=651547 http://www.1addicts.com/forums/showthread.php?t=662265 http://www.1addicts.com/forums/showthread.php?t=709182 http://www.1addicts.com/forums/showthread.php?t=677414 N55 (no secondary cats) = BMW part # 18307599743 For the OEM bolts and gaskets part #, see these earlier posts of Dackel: http://www.1addicts.com/forums/showp...02&postcount=8 http://www.1addicts.com/forums/showp...1&postcount=16 Call around for the N55 midpipes because some sellers over-charge. Normal price is sub $400. N55 (left) versus N54 midpipes (right): If you also change downpipes, the ECU will throw codes at you (detecting the absence of primary cats) which you need to deal with (no such thing if you only change mids) + might result into undesirable results (too loud, too smelly, trouble with authorities and neighbors). See for example: http://www.1addicts.com/forums/showthread.php?t=787223
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01-08-2013, 03:53 PM | #52 |
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original 1M mid pipe dummy resonator...
I think I found a pic(s) of the factory 1M mid pipe resonator cut open. Like my German buddy told me... he sold his OE 1M mid pipe to a guy wanting a louder exhaust... so he cut open the resonator and was going to make a "straight pipe". But to his surprise... THAT is exactly what BMW had already done! So now we know why the stock exhaust drones a little bit!
Here are the pics I found on the web...
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01-08-2013, 04:04 PM | #53 | |
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That's a one hairy resonator Dack! What was BMW thinking, Hobbit?
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01-08-2013, 05:36 PM | #54 | |
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Actually, matches well with the "BMW Performance VO Steering Wheel Winter Cover".
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01-09-2013, 09:45 PM | #55 | |
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01-09-2013, 11:46 PM | #56 | |
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Have we confirmed if either the non-M N54 midpipes or the N55 midpipes have similar resonator construction?
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01-10-2013, 06:39 AM | #57 | |
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IF anyone wants to cut up their stock n54 resonator... I would love to see whats inside the can/box! Here is a pic of my N55 mid pipe...
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01-10-2013, 10:02 AM | #58 |
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I will once I get a hold of a N55 Mid-Pipe... Does anyone have a N55 mp laying around?
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01-10-2013, 01:07 PM | #59 | |
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Great work as always, Dack!
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10-04-2013, 06:47 AM | #60 |
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Just had my N54 midpipe replaced under motorplan due to loose cats inside the housing.
The midpipe alone without the gaskets and labour cost R36000.00 ($3606,84)
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04-25-2014, 01:14 PM | #61 |
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04-25-2014, 04:07 PM | #62 | |
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04-25-2014, 05:31 PM | #63 | |
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But hey.... why not take off your factory mid pipe and cut it apart? Then you will know for sure. Only cars to get a "different" exhaust are the cars built for the Chinese market. Those car's get a quieter exhaust and only two of the four tail pipes really work. The other two are "dummies". There was an old thread when the 1M first came out how the inner(?) exhaust pipes were clean while the outer ones were dirty on Chinese market cars. Dack
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04-26-2014, 01:40 AM | #64 | |
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Place a 135i/N54 mid pipe alongside a 1M mid pipe and shine a torch in the resonator exit.. No rocket science needed here, the difference is quiet obvious. |
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04-29-2014, 12:54 PM | #65 |
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Was there a pun in "quiet obvious"
In seeing the photos of all the variations, It seems they all have an internal Y pipe, but the non 1M cars have perforations in the collector to allow resonances to dissipate into the wool, whereas the 1M has the same Y pipe without perforations. The question is whether allowing the resonances to be absorbed into the wool actually limits power in any way. It seems to me that it would be effective at reducing resonance (drone) but not rob power. Last edited by keithbickford; 04-29-2014 at 01:00 PM.. |
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10-31-2014, 08:03 AM | #66 |
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Does anyone know what the effect would be of having the N55 midpipe combined with the 1M fake resonator?
Would it influence power at all? Would there be more/better noise? What would happen to the drone? |
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