Cooper (non S) Modifications specific to the MINI Cooper (R56).

Diameter of factory exhaust?

  #51  
Old 03-24-2010, 03:21 PM
MiniMack46
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oh ok so after the header i would have to put a high flow cat like where the factory 2nd cat and resonator are?
 
  #52  
Old 03-24-2010, 03:41 PM
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Originally Posted by MiniMack46 View Post
oh ok so after the header i would have to put a high flow cat like where the factory 2nd cat and resonator are?
That is what works for my MINI -- with the 1st O2 sensor in the header and the 2nd O2 sensor just behind the cat.
 
  #53  
Old 03-24-2010, 04:13 PM
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nice i really want to go do this now, i just don't have the time with homework!!! so after doing this you felt an increase in power and sound? or one or the other?
 
  #54  
Old 03-24-2010, 07:35 PM
drewstermalloy
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Ron- do you have pictures of under the car???
 
  #55  
Old 03-24-2010, 07:44 PM
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It feels stronger but power is subjective without an actual dyno !

Sound I have a Vibrant resonator and a Supertrapp muffler beyond the cat. I think the Supertrapp is cool because you can tune from sorta loud to real loud -- you add and remove disk. With 8 of 12 disk installed it has a throaty growl on acceleration yet it does not drone at steady highway speeds and if you need to be quite you can.

Almost any car with a header is going to be louder than without.

Sorry no pictures -- I will try and take some the next time I have it up.
 

Last edited by ron-s mini; 03-25-2010 at 06:18 PM.
  #56  
Old 05-11-2010, 04:37 PM
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any sound clips of it ron?
 
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