Cats & Resonator Remove? - BMW M5 Forum and M6 Forums
E60 M5 and E61 M5 Touring Discussion 2005- Advertiser's Forum

Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 15 Old 2nd June 2006, 01:11 AM Thread Starter
PhillyE60M5
Member, Sport: Off DSC: On (>50 posts)
 
PhillyE60M5's Avatar
 
Join Date: May 2006
Location: Philadelphia
Posts: 71
Thanks: 0
Thanked 0 Times in 0 Posts
Cats & Resonator Remove?

I just have my resonator removed yesterday and thinking about removing my cats as well. Do anyone have a video or sound file on how loud it is with the stock ehaust? or any thoughts on this procedure? I'm going with custom straight pipes..

2006 BMW M5 Silver Grey/Black <-- BOOSTED R.I.P. 6/19/2006
2006 Porsche C4S Cab (coming soon) GT Silver/Black
2004 Land Rover Discovery Black/Black
2003 BMW E46 M3 'Vert (Black/Black)
1999 Mercedes E55 White/Black & Blue Interior
PhillyE60M5 is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 2nd June 2006, 02:00 AM
PPG4
Member, P500 Sport, MDM on (>800)
 
PPG4's Avatar
 
Join Date: Nov 2005
Location: San Diego, CA
Posts: 898
Thanks: 0
Thanked 1 Time in 1 Post
There have been a number of studies over the years by various car mags that have suggested that removing cats on modern cars will do little or nothing to enhance performance.
PPG4 is offline  
post #3 of 15 Old 2nd June 2006, 03:42 AM
Realtycar
Addicted Member (>300 posts)
 
Realtycar's Avatar
 
Join Date: Nov 2005
Location: USA
Posts: 376
Thanks: 0
Thanked 6 Times in 4 Posts
cats are "built into " the headers....to remove them, you need new headers.

Last edited by Realtycar; 2nd June 2006 at 03:42 AM.
Realtycar is offline  
post #4 of 15 Old 2nd June 2006, 04:48 AM
BostonRocket
M5 Expert (>4000)
 
BostonRocket's Avatar
 
Join Date: Dec 2000
Location: Boston, MA
Posts: 4,101
Thanks: 0
Thanked 5 Times in 5 Posts
Quote:
Originally Posted by Realtycar
cats are "built into " the headers....to remove them, you need new headers.
There are two sets (four total) of cats on the car. You cna remove the secondary ones.

'Rocket
BostonRocket is offline  
post #5 of 15 Old 2nd June 2006, 05:12 AM Thread Starter
PhillyE60M5
Member, Sport: Off DSC: On (>50 posts)
 
PhillyE60M5's Avatar
 
Join Date: May 2006
Location: Philadelphia
Posts: 71
Thanks: 0
Thanked 0 Times in 0 Posts
I'm not looking for performance per se...but more of a noise factor. I want a FART CANNON!!!

2006 BMW M5 Silver Grey/Black <-- BOOSTED R.I.P. 6/19/2006
2006 Porsche C4S Cab (coming soon) GT Silver/Black
2004 Land Rover Discovery Black/Black
2003 BMW E46 M3 'Vert (Black/Black)
1999 Mercedes E55 White/Black & Blue Interior
PhillyE60M5 is offline  
post #6 of 15 Old 2nd June 2006, 06:27 AM
NobleM400
Company Representative of RPI Power
 
NobleM400's Avatar
 
Join Date: Jan 2006
Location: RPV
Posts: 3,385
Thanks: 78
Thanked 516 Times in 330 Posts
NobleM400 is offline  
post #7 of 15 Old 2nd June 2006, 06:54 AM
ehpexs
Member, P400 Sport, DSC On (>550)
 
ehpexs's Avatar
 
Join Date: Mar 2006
Location: Canada
Posts: 551
Thanks: 0
Thanked 0 Times in 0 Posts
Or if your truely feeling advertous remove the headers and then you will at least have a cannon.

Robert
ehpexs is offline  
post #8 of 15 Old 2nd June 2006, 05:11 PM
SC'dKellenersM5
M5 Guru (>2000 posts)
 
SC'dKellenersM5's Avatar
 
Join Date: Apr 2004
Location: Sin City
Age: 35
Posts: 2,288
Thanks: 0
Thanked 3 Times in 3 Posts
Look for Georges sound clips with the eisenmann section 1+2 replacement pipes and the Eisenmann Meist. SUS exhaust.

Thats pretty loud.

Im in the highspeed aluminum business
SC'dKellenersM5 is offline  
post #9 of 15 Old 4th June 2006, 06:49 AM Thread Starter
PhillyE60M5
Member, Sport: Off DSC: On (>50 posts)
 
PhillyE60M5's Avatar
 
Join Date: May 2006
Location: Philadelphia
Posts: 71
Thanks: 0
Thanked 0 Times in 0 Posts
I just had my Cats removed in addition to my resonator, and I must say it's definately a sweet sound. Pretty close to the Eisenmann Race Exhaust, just a tad bit softer. Going through the Holland Tunnel was simply amazing. What do you guys think of removing the muffler and make it a complete Straight Pipe?

2006 BMW M5 Silver Grey/Black <-- BOOSTED R.I.P. 6/19/2006
2006 Porsche C4S Cab (coming soon) GT Silver/Black
2004 Land Rover Discovery Black/Black
2003 BMW E46 M3 'Vert (Black/Black)
1999 Mercedes E55 White/Black & Blue Interior
PhillyE60M5 is offline  
post #10 of 15 Old 4th June 2006, 03:38 PM
TCM
M5 Expert (>4000)
 
TCM's Avatar
 
Join Date: Sep 2001
Location: Tyngsborough, MA
Posts: 4,247
Thanks: 4
Thanked 85 Times in 69 Posts
I don't think it will be all that loud straightpiped honestly. At lest not audibly satisfying. I have run the E60 without any mufflers and it sounded quite dreadful. I think the exhausts help baffle that sound into a good tone and allowit to pierce ears at certain decibals whereas a straightpipe setup just blasts out all sorts of odd tones. Hope this helps.

T.C.
'01 Brushed Steel M5
AC Schnitzer:DFC suspension, anti-sway bars, pedals
front splitters

Dinan:CAI, MAFS, Throttle bodies, Velocity Stacks,
Stage 2 aluminum flywheel, front + rear strut bars,
3.45 differential

Others:Custom G-power Exhaust, Autosolutions short shifter
Supersprint Headers, Racing Cats, X-pipe
SPEC stage 3 clutch, Evolve Alpha-N Stage 5 ECU, Schrick Cams, IATS Temp Sensor
OZ Racing Superleggera III f19x8.5 r19x10.5, Brembo brakes
Evosport Power Pullies, Rouge transmission mounts, Plasma ignition coils
Euro interior conversion, M-technic grill with brake ducts,
CA Automative custom carbon fiber hood

&
'01 Silverstone M5- sold
AutoSolutions:short shift kit (40% reduction)
Automotive Specialist:cold air intake, swaybar brackets
Dinan:front strut tower bar, rear swaybar
Kelleners: race exhaust, suspension, ecu software
Rogue Engineering:transmission mounts
SuperSprint:X-pipe
TCM is offline  
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW M5 Forum and M6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Similar Threads
Thread Thread Starter Forum Replies Last Post
Which Race Cats???? cableguy E39 M5 and E52 Z8 Discussion 15 22nd April 2006 12:46 AM
Headers and Cats questions ashbash E39 M5 and E52 Z8 Discussion 0 18th April 2006 12:48 AM
IF CATS removed.....Or m5 rus E39 M5 and E52 Z8 Discussion 22 1st June 2004 07:45 AM
Standard cats vs high flow cats ? madmax E39 M5 and E52 Z8 Discussion 0 15th March 2004 07:45 AM

Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome