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When I did my Z3 head, I drilled and tapped the hole off-center of the existing hole in the head to get the fitting away from the mani. If you need more room, then a weld-on bung would be the best choice with a tight 90 degree fitting.

You CAN NOT eliminate this line or the motor will quickly overheat every time!
Great work but your dumping hot coolant into the inlet. Therefore your dumping hot water into the side the cold water is suppose to be coming from, basically bypassing the radiator. Anyway to dump into the main coolant out that's about 3 inches away?
 

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Hey I bought a bunch of these. Had to meet a minimum order of 50, so now I have a bunch of extra $10 ea. these won't interfere with the intake and are the perfect size. Also the holes on the inside are larger than if you use the other fitting so you get better flow.
 

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So you shelled out 500$ on brass fittings ? You realize you can get it at home depo right?! Ace hardware, shit even eBay delivered to your door.
 

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So you shelled out 500$ on brass fittings ? You realize you can get it at home depo right?! Ace hardware, shit even eBay delivered to your door.
Not in this size. And no $10 covers shipping. I looked at home depot etc. After u buy that crap the id was like half the original size. I for see over heating issues with a track car. This was cheaper than doing the whole an fittings and better flow. Ill sell all these eventually
 

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on my o4 k24a2 i left the EGR hole open. didnt effect anything at all.
heres how i did the coolant dealy because i bought an RBC that was already cut :/
this peice came with the k24a2 upper coolant parts kit. my heater core was plugge off so i tried to use this. but i didnt.

grinded it down on the sides so the mani didnt hit it.
drilled out the hole in the head to make it fit.
then snugged the fitting in

ENDED UP USING A SMALLER BRASS FITTING
that fitting was still too bulky so i got a brass fitting same as above post.
in this pic you can see the JB weld around it(bottom left of picture)

drove many miles on it extremely abused. never leaked coolant or broke :)
 
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