How many of these are still floating around?

onebluemcm · 02-15-2024, 08:45 PM

I bought these headers many years ago. Standard euro headers I think, yes? How can you tell standard vs CSL? So long ago I'm embarrassed to say I can't remember for sure, but I'm nearly 100% they are not CSL.

What was the euro spec exhaust layout? Would it have been these headers, catted section 1, x-pipe with resonator and stock mufflers? We're the stock euro Z4s louder by default then, not having the cats in the headers?

Regarding section 1, and I admit ignorance here, would it be possible to run small resonators upstream of the cats? I know space is tight, not sure what that would do to cat functioning.

86Zed · 02-20-2024, 12:35 PM

A bit of forum digging for ya, others can correct if I am wrong....

- Euro M3s before 03/2005 use Catless Headers. PNs 11627830658 and 11627830659
- Euro M3s after 03/2005 use CSL catless headers.

- Euro Z4Ms always used CSL headers. PN 11627833500 and 11627833501
- USA Z4Ms PN 18407836640 and 18407836641

02-15-2024, 08:45 PM	#1
onebluemcm Captain 42 Rep 632 Posts Drives: '07 Z4MC Join Date: Apr 2010 Location: Richmond, VA iTrader: (0)	How many of these are still floating around? I bought these headers many years ago. Standard euro headers I think, yes? How can you tell standard vs CSL? So long ago I'm embarrassed to say I can't remember for sure, but I'm nearly 100% they are not CSL. What was the euro spec exhaust layout? Would it have been these headers, catted section 1, x-pipe with resonator and stock mufflers? We're the stock euro Z4s louder by default then, not having the cats in the headers? Regarding section 1, and I admit ignorance here, would it be possible to run small resonators upstream of the cats? I know space is tight, not sure what that would do to cat functioning. Attached Images __________________ \|=.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-.=\| Silbergrau A08 / Sepang Brown LSD6 / Carbon Leather 4MY (1 of 3, this combo) RAC RG63 \| Conti EC-DW \| GC/Koni-Dinan \| Rogue RSM \| Arqray \| Autosolutions \| BMW brace \| Pinnacle tint
	Appreciate 0 Tweet Quote

02-20-2024, 12:35 PM	#2
86Zed Get off my lawn 932 Rep 1,159 Posts Drives: 6MT Join Date: Sep 2015 Location: USA iTrader: (7) Garage List 2023 GR Corolla [0.00] 2022 BMW X3 M40i [10.00] 2007 BMW Z4M Coupe [0.00] 2002 BMW 325xiT [0.00] 1991 BMW 318is [0.00]	A bit of forum digging for ya, others can correct if I am wrong.... - Euro M3s before 03/2005 use Catless Headers. PNs 11627830658 and 11627830659 - Euro M3s after 03/2005 use CSL catless headers. - Euro Z4Ms always used CSL headers. PN 11627833500 and 11627833501 - USA Z4Ms PN 18407836640 and 18407836641
	Appreciate 0 Quote