JDL Header Question - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Swolzee · 05-19-2021, 10:28 PM

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?

RayRay88 · 05-19-2021, 10:30 PM

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

Swolzee · 05-19-2021, 10:55 PM

Quote:

Originally Posted by RayRay88

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.

PulsarBeeerz · 05-20-2021, 12:03 AM

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

jflogerzi · 05-20-2021, 12:34 AM

Get the 4-2-1 EL period.

Swolzee · 05-20-2021, 01:17 AM

Quote:

Originally Posted by jflogerzi

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

05-19-2021, 10:28 PM	#1
Swolzee Senior Member Join Date: Mar 2021 Drives: Honda Insight Location: North Carolina Posts: 113 Thanks: 39 Thanked 42 Times in 24 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	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?

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05-19-2021, 10:30 PM	#2
RayRay88 Senior Member Join Date: Feb 2018 Drives: 2017 86 860 Special Edition Location: Toronto Posts: 559 Thanks: 198 Thanked 462 Times in 241 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	There is the 4-2-1 EL and the 4-1 EL.

05-20-2021, 12:03 AM	#4
PulsarBeeerz Senior Member Join Date: Mar 2017 Drives: JRSC BRZ SOLD Location: Ohio Posts: 939 Thanks: 682 Thanked 741 Times in 396 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I don't believe JDL offers the 4-1 anymore.. Dyno here https://www.ft86club.com/forums/showthread.php?t=130248

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