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Old 01-14-2021, 10:54 PM   #1
Doc_Scott_PT
 
Drives: 2021 ZL1 stuck at 1100, GMC, Cruze
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Kooks Green Cats question

I'm looking at a bolt on ported blower build, no meth, no cam, no e85, with kooks headers, 2.30 pulley, and new heat exchanger with larger coolant tank at around 650/700 who, how well will the green cats hold up to that power and to being daily driven? I need reliability more than anything else.

Last edited by Doc_Scott_PT; 01-14-2021 at 11:05 PM.
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Old 01-15-2021, 02:02 AM   #2
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Quote:
Originally Posted by Doc_Scott_PT View Post
I'm looking at a bolt on ported blower build, no meth, no cam, no e85, with kooks headers, 2.30 pulley, and new heat exchanger with larger coolant tank at around 650/700 who, how well will the green cats hold up to that power and to being daily driven? I need reliability more than anything else.



Fine. I would be concerned when you go over 800rwhp
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Old 01-15-2021, 07:40 AM   #3
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If you are going to run cats, those are the ones to have. At your power level they will be fine.
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Old 01-15-2021, 08:00 AM   #4
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Quote:
Originally Posted by Doc_Scott_PT View Post
I'm looking at a bolt on ported blower build, no meth, no cam, no e85, with kooks headers, 2.30 pulley, and new heat exchanger with larger coolant tank at around 650/700 who, how well will the green cats hold up to that power and to being daily driven? I need reliability more than anything else.
They will hold up just fine. My car makes more power than that with Kooks 2" headers and green cats and its a daily driver.
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Old 01-15-2021, 08:04 AM   #5
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Quote:
Originally Posted by Doc_Scott_PT View Post
I'm looking at a bolt on ported blower build, no meth, no cam, no e85, with kooks headers, 2.30 pulley, and new heat exchanger with larger coolant tank at around 650/700 who, how well will the green cats hold up to that power and to being daily driven? I need reliability more than anything else.
If you need reliability more than anything else, I don’t understand why you want to mod the car? Keeping the car stock gives you the most reliable vehicle plus keeps your power train warranty intact.
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Old 01-15-2021, 08:36 AM   #6
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Green cats will be fine with your proposed mods. In fact, you would most likely be ok with the standard Kooks cats. I've been running the "high flow" cats for 10k miles with the mods in my signature. I do run e60 almost exclusively which helps keep things cool. I read that std cats are good for 1500 F, greens 2300.
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Old 01-15-2021, 02:39 PM   #7
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Kooks cats should have no problems.

Nice build BTW. Any 103 TB and Big Gulp?
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Old 01-15-2021, 02:49 PM   #8
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If you road race your car at that level they will not hold up , ask me how I know !
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Old 01-15-2021, 03:32 PM   #9
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Quote:
Originally Posted by Repman View Post
If you road race your car at that level they will not hold up , ask me how I know !
are you speaking about the - Green Cats? or Kooks Cats?

What would classify as road racing? Time? Track days? Speeds?
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Old 01-15-2021, 04:41 PM   #10
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Quote:
Originally Posted by CS10SS View Post
are you speaking about the - Green Cats? or Kooks Cats?

What would classify as road racing? Time? Track days? Speeds?
There's no reason to believe the green cats will not hold up if the car is tuned correctly, I believe each cat is rated to 400hp per cat so its really only above 800hp that they might start to become restrictive. That being said, I ran stock cats on my 1000hp Hellcat for almost 2 years without any issues and those were stock. The Kooks Green cats are made by GESI and are the best available, they are not cheap and they are very durable.
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Old 01-19-2021, 12:15 AM   #11
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Quote:
Originally Posted by hawk02 View Post
If you need reliability more than anything else, I don’t understand why you want to mod the car? Keeping the car stock gives you the most reliable vehicle plus keeps your power train warranty intact.

Another way of saying "I want more power conservatively as necessary".
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Old 01-19-2021, 12:17 AM   #12
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Quote:
Originally Posted by Markoz28 View Post
Kooks cats should have no problems.

Nice build BTW. Any 103 TB and Big Gulp?

Yup and yup! Basically bolt on power, good horsepower without affecting drivability, with more cooling and can road trip the car cross country.
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