North American Motoring

Drivetrain Does the F56 run two cats?

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Old 07-25-2017, 02:04 AM
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Does the F56 run two cats?
Hopefully a simple one to answer, I know there is cat in the down pipe, is this a secondary cat in the centre pipe ahead of the centre muffler?

 
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Old 07-25-2017, 03:54 AM
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Item 1 in that diagram is the cat and resonator section.
 
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Old 07-25-2017, 04:55 AM
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Originally Posted by njaremka
Item 1 in that diagram is the cat and resonator section.
Thanks and then there's one in the downpipe, didnt realise this as my car had an aftermarket exhaust when I purchased it.
 
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Old 07-25-2017, 05:57 AM
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Only the DP CAT is monitored, so it won't throw a CEL if the 2nd CAT and/or the resonator are removed.
 
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Old 07-25-2017, 06:47 AM
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For the cost of a JCW exhaust with electronic cut out, I'd opt for that instead.....nice bang for the buck, or at least was when I last checked 2 yrs ago.
 
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Old 07-28-2017, 06:25 PM
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Originally Posted by -=gRay rAvEn=-
For the cost of a JCW exhaust with electronic cut out, I'd opt for that instead.....nice bang for the buck, or at least was when I last checked 2 yrs ago.
The JCW Pro exhaust still has the second cat, but no resonator.
 
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