Has anyone deleted their secondary cats? - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > M3 & M4 > F80/F82/F83 M3 and M4 (2015 - Current)

F80/F82/F83 M3 and M4 (2015 - Current)
F80 BMW M3 sedan, F82 BMW M4 coupe and F83 M4 convertible forum. This 5th generation M3 and all new M4 features a 3.0 liter twin turbo engine (engine code S55) 425hp and 406lbs of torque! Heavy use of light weight materials makes this generation lighter and faster then the outgoing E9x M3.

Reply
 
Thread Tools Display Modes
  #1  
Old 06-12-2017, 12:40 PM
F10-N52 F10-N52 is offline
Banned
Location: Vaughan
 
Join Date: Apr 2017
Posts: 1,891
Mein Auto: 2011 528i RWD
Has anyone deleted their secondary cats?

I think it would be a great sounding cheap mod. plus you get the benefit of keeping your resonator. then you can get a downpipe or change out the muffler. thoughts?
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 06-12-2017, 12:51 PM
acoste's Avatar
acoste acoste is offline
Officially Welcomed to the 'Fest
Location: California
 
Join Date: Nov 2011
Posts: 5,367
Mein Auto: 2010 550i MT
Quote:
Originally Posted by F10-N52 View Post
I think it would be a great sounding cheap mod. plus you get the benefit of keeping your resonator. then you can get a downpipe or change out the muffler. thoughts?

Don't pollute the environment.
__________________
__________________
2010 BMW 550i MT
2003 BMW 325i @216k and counting
1998 BMW 528i MT @ 231k //sold
1997 Saab 9000 //sold
Reply With Quote
  #3  
Old 06-13-2017, 10:32 AM
traf traf is offline
Registered User
Location: South Florida
 
Join Date: Apr 2016
Posts: 56
Mein Auto: Sakhir m3
Quote:
Originally Posted by acoste View Post
Don't pollute the environment.


First time I've heard that one on a car forum


Sent from my iPhone using Tapatalk
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 06-13-2017, 10:41 AM
F10-N52 F10-N52 is offline
Banned
Location: Vaughan
 
Join Date: Apr 2017
Posts: 1,891
Mein Auto: 2011 528i RWD
Lol right? You're not really polluting the environment unless you have a catless downpipe. the secondary cats don't do much except reduce some emission on cold start when the primaries are still cold... you can delete them for like $100 at a muffler shop cheap but very cost effective mod.
Reply With Quote
  #5  
Old 06-13-2017, 11:01 AM
335Fanatic 335Fanatic is online now
Officially Welcomed to the 'Fest
Location: New York, NY
 
Join Date: Aug 2009
Posts: 242
Mein Auto: F80 M3 / E24 633CSi
Buy an aftermarket mid pipe; plenty to choose from for our cars (AA and Remus being the most popular).
Reply With Quote
  #6  
Old 06-13-2017, 11:03 AM
F10-N52 F10-N52 is offline
Banned
Location: Vaughan
 
Join Date: Apr 2017
Posts: 1,891
Mein Auto: 2011 528i RWD
As far as I know most midpipes delete the resonator as well which is something you wanna keep on this car.
Reply With Quote
  #7  
Old 06-13-2017, 01:55 PM
Technic's Avatar
Technic Technic is offline
OEM Audio PnP Integration
Location: Florida
 
Join Date: Jun 2002
Posts: 8,133
Mein Auto: 2017 M3
I replaced each secondary cat with a resonator and the OEM resonator with an X-pipe, kept ZCP exhaust with valves open. Sounds deeper and slightly louder, enough to be heard inside the car with ASD deactivated.
__________________

BMW OEM Audio PnP integration
www.TechnicPnP.com
[email protected]
Reply With Quote
  #8  
Old 11-10-2018, 02:18 PM
nakata06 nakata06 is offline
Registered User
Location: Malta
 
Join Date: Apr 2015
Posts: 5
Mein Auto: BMW M4
Has anyone deleted the cats and measured what the gains where. Is it worth removing the secondry cats?
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > M3 & M4 > F80/F82/F83 M3 and M4 (2015 - Current)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 10:22 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.