are csl headers a direct fit on to our cars.

[Mikewarlover]

Hi i have been looking into headers and just wonder are all m3 headers a direct bolt on ss, or csl . I think the cats are different. Also can u just run header with oem cats.

[Burt Reynolds]

The primary cats are in our header. Secondary cats are after headers. CSL should bolt up but I have no idea where to buy them or what the benefit would be over other headers...especially if cost is high.

[MVF4Rrider]

http://www.turnermotorsport.com/html...3-EURO-HEADERS

[O-cha]

Originally Posted by MVF4Rrider

http://www.turnermotorsport.com/html...3-EURO-HEADERS

Euro headers (those euro headers) are NOT csl headers though they look similar.

That said, euro Z4 Ms use TRUE CSL headers, so yes they bolt right up.

Issue is you only have 2 bungs in the headers. You need a tune to delete the secondary o2s anyway, but you will need to find a way to get the EGT sensor into the headers or midpipe.

[O-cha]

Also, turner advertises a lot of stuff for e46 M as for the z4m as well that does NOT work for the z4m so be very careful when purchasing anything for the z4 ms from them and get it in writing somewhere that they claim it's for our car. (like the shark injector, which will not work on our cars.)

[mpower03]

here you go:

http://store.bimmerworld.com/shared/...t=products.asp

[mpower03]

they look the exact same in both of the pictures... so idk.. they are probably advertising wrong

[Mikewarlover]

so only true csl headers willl work not euro headers? wat other headers work for our car? Supersprint ?

[mpower03]

any header off of a e46 m3 should work... for the most part. there is active autowork, agency power (same as ebay i believe), supersprint (ebay headers are a copy of ss, i believe), and more. i just bought the ebay headers last week and i am installing them this weekend. several people on the forum have them installed on their car, and haven't run into problems.

[mpower03]

oh go on m3forum.net, search headers for the e46 m3. you will see a ton of stuff pop up, take your time and read them you will learn quite a bit from them.

[Mikewarlover]

I am really concerned about the quality of the Ebay headers...

[O-cha]

Originally Posted by mpower03

they look the exact same in both of the pictures... so idk.. they are probably advertising wrong

Originally Posted by Mikewarlover

so only true csl headers willl work not euro headers? wat other headers work for our car? Supersprint ?

No euro headers will work as well, but they arent the same as csl headers, same basic design but they are formed in a different way for instance.

Originally Posted by Mikewarlover

I am really concerned about the quality of the Ebay headers...

A valid concern, just finished another set today and they were of course like all the rest.

If the Idea of hammering headers onto your engine bothers you enough to be worth 1kish (along with all the other stuff) I would not get the ebay headers.

[Mikewarlover]

so ocha any idea of power gain from euro or csl header? more from csl maybe?

[O-cha]

Probably not no.

[MVF4Rrider]

Originally Posted by O-cha

Euro headers (those euro headers) are NOT csl headers though they look similar.

That said, euro Z4 Ms use TRUE CSL headers, so yes they bolt right up.

Issue is you only have 2 bungs in the headers. You need a tune to delete the secondary o2s anyway, but you will need to find a way to get the EGT sensor into the headers or midpipe.

Not sure the part numbers of what Turner sells, but the Euro Z4 M headers and M3 CSL headers share the same part numbers.

[O-cha]

Originally Posted by MVF4Rrider

Not sure the part numbers of what Turner sells, but the Euro Z4 M headers and M3 CSL headers share the same part numbers.

Are they? I had no idea.

Originally Posted by O-cha

Euro headers (those euro headers) are NOT csl headers though they look similar.

That said, euro Z4 Ms use TRUE CSL headers, so yes they bolt right up.

[fatmatt0116]

Is it worth the extra 500 bux to get the stepped headers from supersprint? What exactly is the benefit of this option?

[JCz04Bimmer]

So by installing something like this:

http://store.bimmerworld.com/shared/...immerworl&All=

We would be effectively removing the first stage cats that exist in our stock headers, correct? The sensors pull data from these cats and not the secondary ones, right? So therefore we need to either tune to ignore the absence or install the sensors and tune to account for the change in data (so as to not throw a SES light).

[O-cha]

Originally Posted by JCz04Bimmer

So by installing something like this:

http://store.bimmerworld.com/shared/...immerworl&All=

We would be effectively removing the first stage cats that exist in our stock headers, correct? The sensors pull data from these cats and not the secondary ones, right? So therefore we need to either tune to ignore the absence or install the sensors and tune to account for the change in data (so as to not throw a SES light).

Fuel is determined by the primaries, the secondaries read after the cats and look for a leaner change from the primaries. Without the cats, no change, without a change, unhappy ECU.

Most tunes remove them in the same fashion, that is basically disable them completely so that they don't even need to be plugged in (room for a wideband )

[O-cha]

Originally Posted by fatmatt0116

Is it worth the extra 500 bux to get the stepped headers from supersprint? What exactly is the benefit of this option?

Stepped headers are bigger in diameter, the CSL or euro headers only have 1 set of bungs (can't put secondaries in or a wideband if you need/want to without some cutting and welding).

I think you have to use supersprint S pipes with the step headers though, which they do not make for our car.

[F360C]

Originally Posted by MVF4Rrider

Not sure the part numbers of what Turner sells, but the Euro Z4 M headers and M3 CSL headers share the same part numbers.

Here is a thread from m3 forum that sheds some light on the CSL vs Euro header debate. This guy after alot of trouble found out that the pre- 03/2005 m3's do use a different header then the CSL but post 03/2005 euro m3's use the same header as the CSL.

http://www.m3forum.net/m3forum/showt...ght=header+diy

[Z4MCJJ]

Originally Posted by mpower03

any header off of a e46 m3 should work... for the most part. there is active autowork, agency power (same as ebay i believe), supersprint (ebay headers are a copy of ss, i believe), and more. i just bought the ebay headers last week and i am installing them this weekend. several people on the forum have them installed on their car, and haven't run into problems.

Have you installed these yet?

If so, level of difficulty?