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      11-30-2021, 12:56 PM   #1
msdss's Avatar

Drives: Alpine White 2020 BMW M2C
Join Date: May 2015
Location: United States

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Parts Needed to Do CSL Header Conversion?

I have a CSL header, and a CSL section 1 that I would like to put on my US E46 M3.

I've been trying to put a parts list together for everything I need to make it work, but I'm having difficulty finding part numbers, and exactly whats needed to make it as close to OEM as possible.

Is anyone able to either help me put a parts list together, or point me in the direction of one that already exists?

Looking at realoem, and a few other places I found this list of parts...
o2 sensor 1 - #11781405324
o2 sensor 2 - #11787832035
front gaskets - #18307830674
front bolts - #07119902901
front nuts - #11621744323
rear gasket - #11627830668
rear bolts - #11621318568
rear nuts - #18301317898
temperature sensor - #11787831624
cable guide 1 - #11787831182
cable guide 2 - #11787831183
header gasket - #11627830667
header stud - #07129905384
header nut - #11721437202
air pump valve gasket - #11727505259
reinforcement plate bolts - #31106772199

A shop quoted me $1500 for parts, and another $1000 labor (that's with me providing the header and the section 1). That seems a bit insane to me for a parts list. Even with iffy pricing from ecstuning, the parts in total only come to about $900. But I haven't done the swap, so I don't know for sure. Maybe there are parts I need that aren't listed here?

Any help would be appreciated. TY.

Last edited by msdss; 11-30-2021 at 01:21 PM..
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