OBX headers...what is this tube for?

[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?

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

[zr1assassin]

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]

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]

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]

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]

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

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]

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.