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Old 12-16-2015, 11:13 PM   #1
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Kooks green cats on s550 2016 mustang

I went and purchased a full kooks system with there kooks green cats. I can't say anything really negative about fit and finish. Car sounds awesome exhaust fitment is on the money. But I purchased the green cats for a reason of not throwing a cel (check engine light ) was wondering if any one else has had this issue with kooks green cats.



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Old 12-17-2015, 01:10 PM   #2
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you will still get a code, they flow too well, therefore the thrown code
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Old 12-17-2015, 05:56 PM   #3
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Yeah I checked the sampling rate and seen both o2s switching almost identical. At the point there no difference between the two. Should just braze up the rear o2 sensor fins so less exhaust gas is sampled lol


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Old 12-22-2015, 02:16 PM   #4
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Ghost, have you driven the car much and did it indeed throw a code? I am looking at the Kooks Long tube / Green Cat combination. I planned to get the 1 3/4" tube set. What set did you get and what are you using the car for?
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Old 12-22-2015, 05:07 PM   #5
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Quote:
Originally Posted by Road Dog View Post
Ghost, have you driven the car much and did it indeed throw a code? I am looking at the Kooks Long tube / Green Cat combination. I planned to get the 1 3/4" tube set. What set did you get and what are you using the car for?

It's my Dailey driver man. It flags it every 300 miles roughly after it sees a drive cycle or two. It's a insufficient cat code. Kooks said that they shouldn't throw a code but seen that is false. And lots of people are having the same issues. There 1 7/8 long tube green cats and full cat back by cooks. I will probably do like the rest and turn them off in a tune and call it done


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Old 12-23-2015, 05:28 PM   #6
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Thanks Ghost, Have you contacted Kooks about it? Just wondering what they would say about it.
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Old 12-23-2015, 08:04 PM   #7
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Thanks Ghost, Have you contacted Kooks about it? Just wondering what they would say about it.

Not yet man , I was going to try to get ahold of them and see what they say. I have to get my car in the air again and get the number off the cats. I know they will want the eo numbers or part number off them




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