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Kooks round port headers on ZR1/Z06

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Old 08-18-2018, 05:01 PM
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Red Devil
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Default Kooks round port headers on ZR1/Z06

Does anyone have round port Kooks headers instead of the specific D port installed on their ZR1/Z06? Any fitment or performance issues?
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Old 08-20-2018, 12:19 AM
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chubbs6350
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I think that'll be counterproductive, it'll make the airflow more restricted But that's just my opinion Here's a pic of my stock manifold next to my kooks 2"
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Old 08-20-2018, 09:56 AM
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Originally Posted by chubbs6350 View Post

I think that'll be counterproductive, it'll make the airflow more restricted But that's just my opinion Here's a pic of my stock manifold next to my kooks 2"
Thanks! I did speak with Kooks and they did say it would be fine but wanted to see if I could get some real world experience from someone on here that has actually done it.
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Old 08-20-2018, 02:14 PM
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Whats the concern here? ARH 2" LT's are round port if I'm not mistaken. Shouldn't be a problem at all...

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Old 08-20-2018, 02:38 PM
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Ya I think arh is round actually, I just figured it'd cause turbulence if it wasn't lined up the same but I guess not cause arh is the best system you can buy for our cars
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Old 08-21-2018, 03:39 PM
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as long as there is no interference in the flow (a step up is not an interference) there is no power loss. I had 2" round pourt kooks on my car and my tuner was amazed that I picked up 45 rwhp by installing those headers.
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