JDL Header Question
 

Merchant listings for the JDL equal length header is fairly confusing.

I'm not exactly sure If there are multiple variants of the equal length header available, or if it's only one header with varying generational developments oldest to newest. Some clarity on this would be great.

The other question I have is what is the outlet diameter flange size on each header or the one header?

There is the 4-2-1 EL and the 4-1 EL.

Thank you. So two variants. I would assume the sound signatures on these are quite different does anyone have audio clips of each?

Are there any overlay dyno charts on these? There again I'm sure flow characteristics are going to be different with these merge collectors.

I don't believe JDL offers the 4-1 anymore.. Dyno here https://www.ft86club.com/forums/showthread.php?t=130248

Get the 4-2-1 EL period.

I think this statement is about spot on. I was able to do a bit of digging and this is the best I could find which does clear up a lot of my questions.

https://www.ft86club.com/forums/show...=135847&page=3