BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Post Reply
 
Thread Tools Search this Thread
      11-27-2012, 10:29 PM   #1
Julio Perez
New Member
 
Drives: BMW M3
Join Date: Sep 2012
Location: Miami

Posts: 11
iTrader: (0)

Exhaust question

Hi guys I have an 11 m3 I recently took off the secondary cats and resonator to gain more sound.. I was wondering if I could do the oem mod as well with what I've done. Is there anything I need to consider before doing this? I don't wanna lose power just to gain sound...
Julio Perez is offline  
0
Reply With Quote
      11-28-2012, 08:17 AM   #2
gatorfast
Colonel
 
gatorfast's Avatar
 
Drives: MR E90 M3
Join Date: Jan 2008
Location: SoFla

Posts: 2,480
iTrader: (3)

The OEM mod is independent of any cat/resonator mods so no reason you cant do it. As for things to consider...the increase in volume will be substantial compared to simply removing the secondary cats and resonators with the stock rear section and the resulting sound will likely be very raspy.
gatorfast is offline  
0
Reply With Quote
      11-28-2012, 10:29 AM   #3
Julio Perez
New Member
 
Drives: BMW M3
Join Date: Sep 2012
Location: Miami

Posts: 11
iTrader: (0)

Quote:
Originally Posted by gatorfast View Post
The OEM mod is independent of any cat/resonator mods so no reason you cant do it. As for things to consider...the increase in volume will be substantial compared to simply removing the secondary cats and resonators with the stock rear section and the resulting sound will likely be very raspy.
I would like to increase sound but my worry is if it'll be too raspy that it wouldn't be worth doing it .. What do you think ?
Julio Perez is offline  
0
Reply With Quote
      11-28-2012, 11:36 AM   #4
gatorfast
Colonel
 
gatorfast's Avatar
 
Drives: MR E90 M3
Join Date: Jan 2008
Location: SoFla

Posts: 2,480
iTrader: (3)

If you dont want rasp I would honestly put the 2nd cats and resonators back on and just do the oem mod.
gatorfast is offline  
0
Reply With Quote
      11-28-2012, 12:21 PM   #5
THE TECH
BimmerPost Supporting Vendor

 
THE TECH's Avatar
 
Drives: BPMsport 2012 E92 M3
Join Date: Jun 2011
Location: Kansas

Posts: 13,037
iTrader: (42)

Garage List
Send a message via AIM to THE TECH Send a message via Skype™ to THE TECH
I'd bet it will be quite raspy since you'd end up having a full straight piped setup.
__________________
THE TECH is offline   United_States
0
Reply With Quote
      11-28-2012, 01:01 PM   #6
Julio Perez
New Member
 
Drives: BMW M3
Join Date: Sep 2012
Location: Miami

Posts: 11
iTrader: (0)

What about doing the oem mod and putting the resonator or secondary cats back on ?
Julio Perez is offline  
0
Reply With Quote
      11-28-2012, 01:40 PM   #7
tulsas
New Member
 
Drives: 2009 E92 M3 DCT & EDC
Join Date: Feb 2009
Location: St Louis

Posts: 19
iTrader: (0)

I'm in the same boat. I've been debating whether to remove second cat and resonator or do OEM exhaust mod. Did you not get the sound increase you were looking for with CAT removal? I'm also having issues finding a shop to do the OEM exhaust mod.
__________________
2007 E90 335i Sedan - Montego Blue Metallic with Black Dakota Leather, Brushed Aluminum Trim, 6 Speed, Sport/Premium/Cold Weather Packages, Comfort Access, Aluminum Pedals, Window Tint
Mods:Active Autowerke Processor, BMS DCI
tulsas is offline  
0
Reply With Quote
      11-28-2012, 01:49 PM   #8
Julio Perez
New Member
 
Drives: BMW M3
Join Date: Sep 2012
Location: Miami

Posts: 11
iTrader: (0)

Quote:
Originally Posted by tulsas View Post
I'm in the same boat. I've been debating whether to remove second cat and resonator or do OEM exhaust mod. Did you not get the sound increase you were looking for with CAT removal? I'm also having issues finding a shop to do the OEM exhaust mod.
There was a very noticeable increase It sounds great but I personally would like to get it even louder I don't really mind drone.. As long as its not a terrible sound
Julio Perez is offline  
0
Reply With Quote
      11-28-2012, 03:33 PM   #9
gatorfast
Colonel
 
gatorfast's Avatar
 
Drives: MR E90 M3
Join Date: Jan 2008
Location: SoFla

Posts: 2,480
iTrader: (3)

Quote:
Originally Posted by Julio Perez View Post
What about doing the oem mod and putting the resonator or secondary cats back on ?
Thats what I suggested 2 posts above yours.
gatorfast is offline  
0
Reply With Quote
      11-28-2012, 03:38 PM   #10
S65NAPWR
Lieutenant
 
Drives: M3
Join Date: Feb 2012
Location: Tri-State

Posts: 557
iTrader: (0)

That shiznit will make babies near by spontaneously combust...
__________________
S65NAPWR is offline   United_States
0
Reply With Quote
      11-28-2012, 10:56 PM   #11
Julio Perez
New Member
 
Drives: BMW M3
Join Date: Sep 2012
Location: Miami

Posts: 11
iTrader: (0)

Can you post a video of what your car sounds like ? Would really appreciate it gatorfast
Julio Perez is offline  
0
Reply With Quote
      11-29-2012, 08:44 AM   #12
SGMe90
tuningtechfs tuned
 
SGMe90's Avatar
 
Drives: 08 SGM e90 M3, 6mt
Join Date: Dec 2010
Location: MD

Posts: 302
iTrader: (4)

I just have the OEM exhaust mod and test pipes, still have rear cats and resonators and it sounds nice when you go wot, see videos. it's not deep or raspy,
__________________
Drives: 08 M3, third pedal baby
previous: 07 e93 335i (jb4)
SGMe90 is offline   United_States
0
Reply With Quote
      11-29-2012, 09:52 AM   #13
lookitsma
Private First Class
 
Drives: BMW M3 E92 Melbourne Red
Join Date: Mar 2012
Location: Brooklyn, NY

Posts: 139
iTrader: (0)

More power to you. Drone made my head spin on the P car.
lookitsma is offline  
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Forum Jump


All times are GMT -5. The time now is 11:18 AM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST