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10-20-2022, 06:36 AM | #1 |
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*ALL* Parts Needed to Convert US E85 Z4M Header Setup to Euro Z4M CSL Header Setup?
Hello All,
I'm in the US and recently bought a 2007 Z4M Roadster and I want to put the CSL headers from the Euro-spec Z4M. I've already read this old but succinct thread summarizing the various types of headers. I have access to new CSL headers i.e. the highly sought-after lighter ones. The part numbers are 11627833500 and 11627833501 for a LHD car. I wanted to start this thread to ask - what are all the OTHER PARTS/NUMBERS I'd need? I want a plug-and-play setup, no soldering. I know there are some wires/sensors I need to move from where they are in a US-spec car to where they'd have to go using CSL headers, but I'd rather buy the corresponding Euro-spec part than "frankenstein" an existing part to save money. Are the O2 sensors that needs re-routing the equivalent of the "BOSCH Oxygen Sensors" on the Euro-spec models, with part numbers 11787837564 and 11787837565? Meaning, can I buy these two to prevent having to cut/solder etc. anything? What other parts do you recommend? And last question - if I replace the headers and install the O2 sensors correctly, will my engine/ECU need any re-programming? Thanks in advance |
10-20-2022, 07:43 AM | #2 |
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You'll need an OEM european section 1 BMW PN 18307836633 for the cleanest install. Stock USA 02 sensors can be used by moving their routing from the passenger to driver side of the engine bay to reach the rearmost 02 location. There is no splicing required, a few zip ties etc. I completed this install with CSL headers in 2019, zero CEL or issues since. 10K miles and a number of track days
Thread with installation videos here https://www.zpost.com/forums/showthr...=331906&page=3 Last edited by 86Zed; 10-20-2022 at 08:52 AM.. |
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10-22-2022, 01:03 PM | #3 | |
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So it sounds like you're saying, all I need are the 1-3 and 4-6 CSL headers (part numbers 11627833500 and 11627833501) and the OEM euro Section 1 (part number 18307836633) and the rest is plug-and-play? I was just curious if I needed any other bits and bobs like all the bolts, gaskets etc. those are all the same for the N. American and Euro models so I can just buy them at the dealership or at Turner Motorsport if I need them. I assume the temperature sensor (no. 8 in the below diagram) from my car will also work with the Euro Section 1? because the Euro part is 11787834704but the N. American part is 11787831624 one more question: do I need to re-tune/re-program anything? I think I will NOT need to with the O2 sensors placed where they should be downstream of the Section 1 cat. That's also what this post says in the thread that you cited.
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10-23-2022, 02:13 AM | #4 | |
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You do not NEED a tune in the sense that you won't get a check engine light, but performance will not be what it could be without a tune. The fueling modifiers are different between Euro and US software versions, as is the ignition timing maps and a host of other things. You could use WinKFP to upload Euro software, but you will need to revert back to US software if you ever want to pass emissions. The Euro software does not run the same OBD tests, and things like the DMTL will show as "not present".
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10-23-2022, 01:46 PM | #5 |
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Great information pokeybritches . I have not tuned my setup because I am holding out for a CSL intake setup eventually, there are still gains on the butt dyno (and noise!) without it.
In terms of parts, yes I would recommend replacing bolts, nuts, clips, gaskets etc while you are in there. A few PNs from my FCPEuro order at the time BMW Clip BMW-12521437136 (02 sensor routing) BMW Hex Bolt BMW-07119902901 BMW Hex Nut BMW-11621744323 BMW Exhaust Flange Nut - Genuine BMW 18301317898 BMW Exhaust Flange Gasket BMW-18307830674 BMW Exhaust Seal Ring BMW-11627830668 LM 508 Anti-Seize Compound Liqui Moly LM2012 Confirm quantities with this diagram for the catalytic converter https://www.realoem.com/bmw/enUS/sho...diagId=18_0658 This diagram for the exhaust manifolds https://www.realoem.com/bmw/enUS/sho...diagId=18_0657 I did not replace the 02 or temperature sensors at the time since mine were all functional, I probably should have given age and accessibility. |
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10-23-2022, 02:57 PM | #6 | |
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10-23-2022, 03:05 PM | #7 | ||
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In the meantime sounds like I can run w/o a specific tune for the Euro Z4M headers/Sec1 cats and gain some good performance for the time being.
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10-28-2022, 10:36 AM | #8 | |
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