Kooks 2 inch Headers

[NGOT8R]

I know you inquired about Kooks LTHs, but I wanted to let you know that Ultimate Headers 1 7/8 LTHs do clear everything (including AC) with no massaging needed. Here’s a pic of the passenger side showing distance between the frame rails and AC line bracket. I would estimate at Least 1/2” from from rail and (although it may not look like it in the pic), 1/4-5/16 from the AC line bracket/stud. I am running Steeda’s adj. motor mounts with engine lowered 1/4”.

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[Ransom]

2V heads require a more refined header whereas 4V can afford to be a sloppy design and still make great power.



With open collector race headers I think there is merit to the collector “choke” that Calvin Elston uses on his headers but again the collector choke is more effective on 2V heads than 4V.

https://burnsstainless.com/blogs/articles-1/merge-collectors

You might want to spend some time on Don Terrell’s Speed Talk and search Calvin Elston. Calvin is a Wizard.

https://www.speed-talk.com/forum/index.php

If you want 2.00" primary 4:1 headers go for it. This isn't old school 2V non-VVT flow dynamics.

Thanks for link, ill definitely do some reading. Im a Honda tech, and i know alot of the guys run big tube headers with megaphones.

I think im going to pull the trigger on the 2" primaries though, and hopefully get it on the dyno this spring.

If it is all out race lose the AC. I believe the 2 in primaries might impact the AC lines, and they will be closer to the frame. You don't want them touching anything and causing a false knock.

That being said some brands 1-7/8 have these same problems.

Im hoping they mean it needs to be removed to install the headers, not to use them.

I know with Kooks you can keep AC.

 

[Ransom]

I know you inquired about Kooks LTHs, but I wanted to let you know that Ultimate Headers 1 7/8 LTHs do clear everything (including AC) with no massaging needed. Here’s a pic of the passenger side showing distance between the frame rails and AC line bracket. I would estimate at Least 1/2” from from rail and (although it may not look like it in the pic), 1/4-5/16 from the AC line bracket/stud. I am running Steeda’s adj. motor mounts with engine lowered 1/4”.

Thats actually another concern of mine. Will the 2" clear everything with the engine lowered, as i have a CJ manifold to install as well. But, once again i havent decided if im going to drop the engine or run a different hood.

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