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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 08-13-2011, 03:40 PM   #21
Sankekur
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Cool, should have picked up what you meant, guess I am a bit slow today , that is true that it is not 100% certain that they will fit, but I willing to risk that the e46/e36 steering column layout/position will not be that different (but with BMW you never know) but we will see won't we
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Old 08-14-2011, 03:10 PM   #22
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Originally Posted by Hornung418 View Post
I think Dan has been trying to fit the LHD headers from a LHD Euro S50 to his RHD M54. So he actually needs the RHD Euro S50 headers to fit his RHD M54.
Afaik, unlike the E46 m3, the headers on the E36 m3 were the same between LHD and RHD. However, it is possible that the layout of the E46 is sufficiently different that the S50 headers might not fit on a RHD car.
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Old 08-14-2011, 03:37 PM   #23
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Hmmm, all of the people I have now spoken to seen convinced that these will fit, anyway thinking of going to have a look at a couple of e36 M3's just to get an idea of what the steering column layout is like.
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Old 08-23-2011, 05:29 AM   #24
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Will be getting mine put in shortly. And will update thread
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Old 08-25-2011, 04:31 PM   #25
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Thanks man.
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Old 08-25-2011, 05:35 PM   #26
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Any progress?
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Old 08-30-2011, 01:56 AM   #27
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Any progress?
I know for fact that euro headers will not bolt up properly on M54 head, thats because M54 has no lower studs on #2 and #5, and that will make those euro headers leak exhaust at the flange/head

Headers have to have one solid flange for 3 outputs to be able to seal properly.

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Old 08-30-2011, 01:14 PM   #28
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sorry for the crapy pic but my friend have welded S54B32 euro headers to M54 flange rest of the exhaust from M3 and it works

[youtube]
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Old 08-31-2011, 04:05 AM   #29
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Sorry for no update yet. Still in progress. I know it will fit - there are some E46 non-m here in Australia with it fitted
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Old 08-31-2011, 09:32 PM   #30
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sorry for the crapy pic but my friend have welded S54B32 euro headers to M54 flange rest of the exhaust from M3 and it works
Keep in mind that the "US Catalyst" is a misnomer. The midpipe on US cars has no cats. Just a resonator in the one pipe. On the US cars, the cats are located in the headers themselves

The fat headers in the picture below are the US M3 headers

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Old 09-02-2011, 09:56 PM   #31
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Same project planned with the euro 50-30 headers.....Anyone know if they will fit in an 2003 325XI???
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Old 10-03-2011, 06:31 AM   #32
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Any updates for this thread, I'm in the process of removing my manifolds and would like confidence before I buy S50B32 manifolds that they will clear the steering rack (RHD), air con pump and the O2 sensors will have space.
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Old 10-04-2011, 06:07 AM   #33
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Originally Posted by HakenTT View Post
I know for fact that euro headers will not bolt up properly on M54 head, thats because M54 has no lower studs on #2 and #5, and that will make those euro headers leak exhaust at the flange/head

Headers have to have one solid flange for 3 outputs to be able to seal properly.
Update, I have encountered this problem. Unfortunately it would be an engine out job to drill and tap some new stud holes which I will not do. I might investigate chopping some M3 manifolds and mating them to an M54 flange as was mentioned above but I don't know if I can be bothered

It was actually easier than I thought to get at the nuts but now how I can remove the manifolds from the car is a different matter. It seems like the upper air con pipe is in the way so I might detach the pump to see if I can create clearance. I need to get the manifolds out anyway to remove the manifold to system studs.
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Old 10-04-2011, 12:40 PM   #34
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I suggest you weld the flanges together with the appropriate material and make one piece from the three individual flanges.

Alternate solution is to tap the bottom flange screws and port/polish the head to match the headers and polish the intake side. You should see quite an impressive gain if you have the time/cash to perform the surgery. Hell, even get some hot cams to match the increased flow.
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Old 10-04-2011, 03:23 PM   #35
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My S50b32 (euro) headers have one flange per cylinder, that is, 6 individual flanges.

I needed to weld on #6 and even with the flanges all bolted to an engine the #6 pipe got tweaked enough to make it difficult to align.

I would strongly recommend the 3-pipes-per-flange style if you want it to bolt up easily.
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Old 10-09-2011, 05:46 AM   #36
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I've read that the S50 manifolds need to be bent slightly to fit a RHD E46. For the time being I'm giving up on this project and fitting the M52 manifolds

This will at least decat the manifolds, but this will be ok as I have the downstream cats also. Strangely enough it seems like the M52 manifolds ARE or CAN BE fitted to M54 330s, see the link below, also note the bolt pattern is the same as my original manifolds (some studs are missing). The part numbers are different to the actual M52 manifolds but the design is identical. The M52 manifolds have all the bolt holes in the flanges of course.

M52 style for M54: http://realoem.com/bmw/showparts.do?...12&hg=11&fg=50

M52: http://realoem.com/bmw/showparts.do?...70&hg=11&fg=50

I checked the O2 sensor part numbers and they are the same so I won't have any stupid thread differences or anything. I'm going to push the studs out and replace with M10x40 bolts of course. I'm going to get custom downpipes made from the flanges to where I cut my original system before the secondary cats.

I tell you what if you are trying to remove or fit manifolds to a RHD car, UNBOLT THE TWO STEERING RACK BOLTS AND MOVE IT TO ONE SIDE TO MAKE SPACE. Not realising I could do this made the job to remove the original ones a complete . I took the original manifolds and threw it out the garage door I was that off.

EDIT: GOD DAMN this job sucked.
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Old 10-10-2011, 11:01 PM   #37
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^ I can't imagine how much of a pain it was in an rhd car. Clearance is bad enough with an LHD car. Congrats on getting it done though! Too bad you couldn't get the s50 manifold to work. I'm assuming you didn't go aftermarket because of the rhd fitment issues... Are there any brand-name ones that'd fit? (Supersprint maybe?)

Also, seems like that the part number is only different because the m54 equivalent is missing the holes for the missing studs. I wonder why BMW deleted those studs...
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Old 10-12-2011, 03:43 AM   #38
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Apologies for the late response. Delayed the exhaust as I bought 272 Shrick cams

But S50 manifold install is underway again and headers are currently being ceramic coated. Once they come back the shop (who I bought the headers from and assured me they will fit) will install them.

Otherwise I get a refund
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Old 10-12-2011, 06:17 AM   #39
Dan330Ci~
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Originally Posted by TerraPhantm View Post
^ I can't imagine how much of a pain it was in an rhd car. Clearance is bad enough with an LHD car. Congrats on getting it done though! Too bad you couldn't get the s50 manifold to work. I'm assuming you didn't go aftermarket because of the rhd fitment issues... Are there any brand-name ones that'd fit? (Supersprint maybe?)

Also, seems like that the part number is only different because the m54 equivalent is missing the holes for the missing studs. I wonder why BMW deleted those studs...
Thanks, RHD ones are rare, Supersprint only make LHD for example.
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Old 10-12-2011, 12:55 PM   #40
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Terra,

BMW probably deleted the studs because of the relative difficulty of installing them with the cats on the headers. With the S50B32 headers, there is more room to work.
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