|
|
07-11-2023, 06:46 PM | #1 |
Major
949
Rep 1,027
Posts |
Catless or Catted Downpipes Z4 35is?
Unlike the E9x platform can’t find any catted downpipes that are below 1k. Only two options are the AR downpipes (1400$+shipping and customs) and lightweight 1800€
So considering catless, but really wonder if the smell is bad with top down? Can anyone chime in? I know secondary’s cats do some filtering, but yeah, not a fan of crude exhaust smell surrounding the car when at a standstill Appreciate any input Cheers!
__________________
Current: G87 M2 / F21 M140 / 718 GT4 | E89 Z4 35is
Gone: E92 M3 | RS3 8V | E82 1M | AMG GT-S | X3M Comp | F80 M3 | Juke Nismo RS | E85 Z4 M Roadster | R58 Coupe JCW | F87 M2C| F87 M2 | F22 M240i | F82 M4 | E89 Z4 2.0i | F56 Cooper S | E92 330i | R56 One |
07-12-2023, 03:27 AM | #2 |
Captain
153
Rep 611
Posts
Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country
|
I run VSRF catless downpipes and never notice any smell apart from a few minutes on first cold start as that’s when the ECU runs it rich to warm up the cats..
I drive almost all the time top down.. In the UK secondary cats do a sufficient good job to pass emissions tests..
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0 Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886 |
Appreciate
1
Dav3948.50 |
07-29-2023, 05:37 PM | #4 |
Private
11
Rep 59
Posts |
VRSF catless won't pass EU emissions check which is annually on most E89s by now.
But there is this solution: https://www.s p o o l s t r e e t .com/threads/z4-e89-n54-downpipes-with-race-cats-and-silicone-intakes.8941/ |
Appreciate
0
|
07-30-2023, 10:58 AM | #5 |
Lieutenant
147
Rep 463
Posts |
Are emission tests more relaxed in UK?
I thought that catless downpipes wont pass here in Estonia... but then read B21 claim that he gets passed? Werent UK like part of EU just a while ago? So did UK not have same EU emissions standards implemented? Im sure the did not go and change them after Brexit?
__________________
2009 35i DCT Havana brown with ivory white interior. Mods: Cobb stage 1+FMIC, Wagner EVO1 FMIC, BMS DCI, KW V3 suspension, M3 front control arms, Hardrace RTAB, Michelin Pilot Sport 4S tires.
|
Appreciate
0
|
07-31-2023, 05:44 AM | #6 | |
Captain
153
Rep 611
Posts
Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country
|
Quote:
I think I pass the Uk requirement by a factor of 2 rather than a factor of 10 times with both sets of cats..
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0 Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886 |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|