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Cat question

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Old Apr 14, 2008 | 05:53 PM
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IIIMBPIII's Avatar
IIIMBPIII
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07 SLK55, 08 R32
Cat question
I was thinking about removing the secondary cat on my car just for a little while to see what it sounds like and have a little fun! But I do not want to harm the car in anyway. Will the engine light come on if I do this also am I in risk of dmaging the vehicle in anyway?

Thanks,
CJ
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Old Apr 14, 2008 | 08:56 PM
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Originally Posted by IIIMBPIII
I was thinking about removing the secondary cat on my car just for a little while to see what it sounds like and have a little fun! But I do not want to harm the car in anyway. Will the engine light come on if I do this also am I in risk of dmaging the vehicle in anyway?

Thanks,
CJ

What you should do is replace the primary cats with kleemann/renntech headers and then replace the secondary cats with kleemann sport cats. I believe the 02 sensors are located in the secondary cats and would have to be relocated or you would get a CEL.
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Old Apr 14, 2008 | 10:07 PM
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I would guess you should be fine removing the secondary cats with straight pipes, but I'm not 100% sure since I don't have my car yet. Check to see if there are any sensors located behind the second cats, if no, you should be good to go.
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Old Apr 15, 2008 | 01:05 AM
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alroumi
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Originally Posted by Tuskir
What you should do is replace the primary cats with kleemann/renntech headers and then replace the secondary cats with kleemann sport cats. I believe the 02 sensors are located in the secondary cats and would have to be relocated or you would get a CEL.
Is the Kleemann secondary catalytics necessary, I have the Kleemann primary cats installed and I am awaiting their headers which is soon to arrive ( transit ) and I've talked to C2D who didnt mention the secondary till the last few days.

Now what I am saying is that would the switch from oem secondary to kleemann cats worth the price on a car with nearly all of the basic modifications.
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Old Apr 15, 2008 | 12:59 PM
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IIIMBPIII
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Originally Posted by 2MANYCARS
I would guess you should be fine removing the secondary cats with straight pipes, but I'm not 100% sure since I don't have my car yet. Check to see if there are any sensors located behind the second cats, if no, you should be good to go.
Thats what I thought oh well when I get back home Ill jack the car up and check if there are any sensors if not Ill remove them make a little vid of what it sounds like and then when all the people that live in a 5 mile radious of me get annoyed Ill put them back on lol
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Old Apr 15, 2008 | 03:03 PM
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Originally Posted by alroumi
Is the Kleemann secondary catalytics necessary, I have the Kleemann primary cats installed and I am awaiting their headers which is soon to arrive ( transit ) and I've talked to C2D who didnt mention the secondary till the last few days.

Now what I am saying is that would the switch from oem secondary to kleemann cats worth the price on a car with nearly all of the basic modifications.
Kleemann headers replace primary cats. Maybe you can move their primary cats to secondary cats, I'm 90% sure they are the same.
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Old Apr 15, 2008 | 03:17 PM
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alroumi
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Originally Posted by Addicted2Speed
Kleemann headers replace primary cats. Maybe you can move their primary cats to secondary cats, I'm 90% sure they are the same.
I was thinking the same thing, I hope so.

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