Kooks Header Numbers?

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Mar 18, 2006 | 01:43 PM

slick1851

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From: CHITOWN

Kooks Header Numbers?

Has anyone seen numbers on these headers? What are they putting down, they look awsome but I want to see there performance befor there on my car.

Qaulity looks great, and welds look great and the design is nice, I just would like to see numbers.

Joe

Mar 18, 2006 | 06:37 PM

-PEPE-

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Curious myself Joe, I hear & was told another 10rwhp, but I take that with a grain of salt, reason I bought them was I was tired of #$%^ing around with the leaky #1 slip-fit primary on my old JetHots, still a nice header though. But on my new build I won't have any idea one from the next, Kooks will be on there with a Kooks ypipe and I'll just get what I get I reckon...

Mar 18, 2006 | 07:16 PM

slick1851

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From: CHITOWN

From what I understand, they have a stepped design that no one else uses on the market. It should in theory make more power on our cars, thinking about picking up a pair myself. I just want to know how much better, ill a wee bit extra power and the fact there stainless and look very well made is good.

Damn no one has numbers on these things?!

Mar 18, 2006 | 07:17 PM

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Quote:

Originally Posted by slick1851

From what I understand, they have a stepped design that no one else uses on the market. It should in theory make more power on our cars

Thats what I bought was the 1-3/4" to 1-7/8" stepped race header, man they are a work of art no doubt, get em get em

Mar 19, 2006 | 10:57 AM

Houdini

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I have before and after dyno run's with the KooK's Headers.

Before = Mid-length headers 2.5" Y-pipe, 389 rwhp and 365 rwtq.

After = KooK's 1-7/8"- 1-3/4" stepped headers 3" custom Y-pipe and Mcleod Street Twin clutch with steel flywheel. 398 rwhp and 375 rwtq

The area under the curve increased everywhere on the dyno pull (2500rpm - 6600rpm), down low I picked up almost 20rwtq. Some of the increase in the torque numbers are due to the heavy flywheel, but on the flip side of that, the heavy flywheel also robs the car of horsepower. So, if I had stayed with the original clutch, I could easily see picking up 15-20rwhp and 10rwtq.