OBX headers...what is this tube for? - Page 2 - ZR-1 Net Registry Forums

WVZR-1 · 03-25-2018

i was surprised to see the HEX on the header EGR - all I'd ever seen previously had the connection that required an OE clamp. Was/is the HEX actually 'free spinning' and threaded?

LT5 EGR '93+.jpg OBX LT5 EGR.jpg

zr1assassin · 03-25-2018

They should sell 2 versions and save themselves time/money putting on at all, think about the numbers of cars 90-92 vs 93-95. They could probably not put it on at all for 80% of them.

zr1assassin · 03-25-2018

Quote:

Originally Posted by WVZR-1

i was surprised to see the HEX on the header EGR - all I'd ever seen previously had the connection that required an OE clamp. Was/is the HEX actually 'free spinning' and threaded?

Attachment 7159 Attachment 7160

Not free spinning but it is threaded

RussMcB · 03-25-2018

Quote:

Originally Posted by WVZR-1

Why wouldn't you ID the thread and go for a threaded solution?

Mine had no threads, inside or out. It was just a simple tube. Very odd.

zr1assassin · 03-25-2018

Quote:

Originally Posted by RussMcB

Mine had no threads, inside or out. It was just a simple tube. Very odd.

The threads are on the ID of the coupler, not the tube

WVZR-1 · 03-26-2018

Quote:

Originally Posted by RussMcB

Mine had no threads, inside or out. It was just a simple tube. Very odd.

Not ODD at all - yours was a duplication of the OE and for use with '93+ you could with 'no issues'. See the image in post#11. I don't get the OBX thing. Maybe someone with a '93+ w/EGR might mention how they accomplished EGR function retention when using OBX.

Yours is what I'd have expected

Quote:

Originally Posted by zr1assassin

The threads are on the ID of the coupler, not the tube

I might have tried to ID the thread and use a mating male fitting of sorts.

I would have thought choosing the option of threading the ID of the tube a better choice could have been made. Your choice works for you so it 'matters NOT'!

tf95ZR1 · 03-29-2018

I learned this from Marc Haibeck:
It uses a compression clamp (and special tool)
called a Oetiker clamp. #7 in above drawing.
Look it up!

Found it! Jerry's Gaskets (of course!)

http://www.jerrysgaskets.com/clamp-e...new-90-95-2c4/

zr1assassin: If you use the EGR system, its a compression connection
egr to nipple on exhaust. No threads, stock no nut.

03-25-2018	#12
zr1assassin Join Date: May 2012 Location: saint joseph mo Posts: 465	Re: OBX headers...what is this tube for? They should sell 2 versions and save themselves time/money putting on at all, think about the numbers of cars 90-92 vs 93-95. They could probably not put it on at all for 80% of them.

03-29-2018	#17
tf95ZR1 Join Date: Aug 2005 Location: Northridge, CA Posts: 1,461	Re: OBX headers...what is this tube for? I learned this from Marc Haibeck: It uses a compression clamp (and special tool) called a Oetiker clamp. #7 in above drawing. Look it up! Found it! Jerry's Gaskets (of course!) http://www.jerrysgaskets.com/clamp-e...new-90-95-2c4/ zr1assassin: If you use the EGR system, its a compression connection egr to nipple on exhaust. No threads, stock no nut. Last edited by tf95ZR1; 03-29-2018 at 01:00 AM. Reason: Wanted 2

03-25-2018	#11
WVZR-1 Join Date: Oct 2004 Posts: 1,890	Re: OBX headers...what is this tube for? i was surprised to see the HEX on the header EGR - all I'd ever seen previously had the connection that required an OE clamp. Was/is the HEX actually 'free spinning' and threaded? LT5 EGR '93+.jpg OBX LT5 EGR.jpg Last edited by WVZR-1; 03-25-2018 at 01:18 PM.