Kooks Cats for High HP

[donjetman]

https://www.lsxmag.com/tech-stories/going-green-adding-kooks-h-o-cats-to-a-zl1-and-making-800whp/

 

[Charlie207]

If I remove two of the three cats. in my factory exhaust with headers, do you think it'll still pass emissions (not visual)?

 

[Foggy]

If I remove two of the three cats. in my factory exhaust with headers, do you think it'll still pass emissions (not visual)?

NOPE

 

[Foggy]

https://www.lsxmag.com/tech-stories/going-green-adding-kooks-h-o-cats-to-a-zl1-and-making-800whp/

I've got the Kooks green cats on my 6.2... Wish I had that HP to test it out !!!!
They don't make them anymore - nor the headers - for our beasts
They are the "bullet" style.. So with my Kooks 1 7/8 headers and the kooks Y pipe with green cats
I don't have to remove any exhaust to drop my transmission pan !

 

[Charlie207]

NOPE

Oh, bother.

I want headers, but it just seems like a chore to deal with getting them to pass NH emissions.

I know shorty headers do nothing for flow/power, but they cost the same as the cast manifolds, and at least look cooler.

My 6.0 rebuild/swap engine is gonna need something. I think the 5.3 manifolds are warped or something, and would be replacing them.