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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-04-2008, 07:14 PM   #21
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reup pics plz
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Old 06-05-2008, 08:39 AM   #22
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FYI: installation for XI models will involve removing axles
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Old 06-05-2008, 08:48 AM   #23
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Old 06-13-2008, 04:35 PM   #24
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hey there, so on installing the headers, is the oxygen sensor going to trigger the light on the computer? now that the cats in the stock headers are gone, wont i need to add cats in the mid piping section to pass emissions?

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Old 06-29-2008, 11:07 PM   #25
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hey there, so on installing the headers, is the oxygen sensor going to trigger the light on the computer? now that the cats in the stock headers are gone, wont i need to add cats in the mid piping section to pass emissions?

thanks,

-Z
If you use the spark defouler mod there should be no problems w/ the CEL/SES light going off. Depending on how strict emissions where you live you might not be able to pass emissions even w/ cats installed
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Old 07-07-2008, 10:48 AM   #26
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just finished the write up helped me so much. thanks. i dont know if it just me but my exhaust smells alot more like gasoline now. im still trying to see if i get better gas millage or not.
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Old 07-12-2008, 10:34 PM   #27
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hey guys, i have been doing this DIY for a while now, and FINALLY got all those damn nuts off the headers... 16 of those little bastards and all 16 are in unbelievable locations... my god... anyway, how do i get the headers out of the engine bay now? it seems they are stuck. Any help/tips are greatly appreciated...
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Old 07-13-2008, 07:08 PM   #28
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hey guys, i have been doing this DIY for a while now, and FINALLY got all those damn nuts off the headers... 16 of those little bastards and all 16 are in unbelievable locations... my god... anyway, how do i get the headers out of the engine bay now? it seems they are stuck. Any help/tips are greatly appreciated...
I'm pretty sure you're finished by now and riding around but Start w/ the one closest to the front of your car.

Btw, you could have just removed the the first out before starting/unbolting the second header. It would have made your job a bit easier.
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Old 08-12-2008, 03:06 AM   #29
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Old 08-27-2008, 11:48 PM   #30
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Here are the differences between Supersprint headers and eBay headers - the ebay headers are pretty much junk for a modded head....I will use them to reduce the backpressure made my the cats then install some high flow cats post headers for the wagon....Look at the differences in the internal flow - molded and beveled on the Supersprint...and the eBay have flow restrictions and the exposed pipe will cause turbulence. Also the eBay headers are not even close to being port matched to the exhaust manifold....but are the same size as the stock exhaust ports on the head.


They look the same from the outside - but the welds and the internal flow is where the extra money spent come into play




The Superspint headers when installed are closer together at the exit and match the OEM exhaust and the Supersprint exhaust - the eBay headers have a 1/2" LARGER gap


Superspint headers







eBay headers





The ports on the Supersprint - notice the smoother inner area







The eBay headers inside


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Old 09-04-2008, 03:47 PM   #31
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Does anyone know how much torque to use when installing the headers?
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Old 10-06-2008, 09:22 AM   #32
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so when u finish up the install, and u install everything back in u can still reach the header bolts? or do u have to leave the splash pan out? so when u heat them up and retighten them. thnkx
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Old 10-06-2008, 01:18 PM   #33
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it is easier to get to the three or four bolts from the bottom - so i would leave the pan off until you are 100% done
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Old 10-08-2008, 08:54 PM   #34
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Nice write up! Yeah I have been sitting on my headers since FEBRUARY!!! I attempted it once, but it started getting late on a Sunday night & didn't want to have to rush to finish it. This definitely answered some questions, and hopefully has sparked some inspiration! I've sorta been waiting to find a friend with a lift
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Old 10-08-2008, 11:08 PM   #35
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Havin aftermarket headers, what catback exhaust is best to use with?
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Old 10-09-2008, 12:02 PM   #36
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Havin aftermarket headers, what catback exhaust is best to use with?
Depending on what you would consider as best.....best performance? best looking? best sounding?

I wouldn't say there is a best exhaust to use with, as most exhausts don't provide much HP compared with some other mods. As for looks, it just depends on what tip style you like.

Now for sound, that is totally up to you again (if you search for sound clips on here you will see quite a few options) How loud do you want, how quiet do you want? Do you like drone or rasp? Do you want to annoy anyone?

Seeing that if you put in headers you won't really have a cat, unless you get an aftermarket one welded in.

After saying that, it would be really loud with headers, no resonators, and a tse3 or straight pipe, but if you had headers, both resonators, and your stock muffler it will be more on the quiet side except that it will have a low rumble.

For a sound in between, I think that you should keep one resonator on, and go with any Ikon, Remus, Stromung, Supersprint, stock muffler, etc (whatever your preferrence), would be fine.
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Old 02-03-2009, 09:19 AM   #37
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Bump this awesome thread

Going for the swap either today or tomorrow , anyone has any ideas on what i should think about ?(Tourqe..etc)
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Old 02-21-2009, 05:07 PM   #38
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Where i have to put lambda sensors? first or second hole? and 02 after cats?
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Old 02-22-2009, 10:47 AM   #39
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Where i have to put lambda sensors? first or second hole? and 02 after cats?
You would place them in the order of the original headers, pre and post sensor. Label them when you prior to removal

Last edited by \\V; 02-22-2009 at 10:56 AM.
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Old 02-22-2009, 11:40 AM   #40
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Good DIY, but unfortunately, I couldn't do a DIY for mine and I've still got eBay headers lying in my garage. Purchasing eBay headers from the US meant I would get LHD ones, and unfortunately; as well all know we drive on the right. Modifications at my local exhaust workshop would set me back at least a few hundred $AUD - and at the moment; I've got no money from spending too much money on different parts. =(
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