so the parts that the zstore sells with their manifold kit, do those have a curved area like you previously described? I don't want to get the wrong parts.

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Sorry, I see where you got the wrong name now.  MSA calls their ECU's "fuel injection brains" or "computers" too, even though they're neither.  They're good but the informality can cause communication problems.  So, yes, those are the yokes that you need.  Calling them spacers can lead to misguided work, like "why don't I just stack some flat washers?".  Oh well.  Good luck.

http://www.thezstore.com/page/TZS/PROD/classic12e01b/14-0373

http://www.thezstore.com/page/TZS/CTGY/classic17b10

yes. those are the pieces I was referencing. good useful Information. thanks

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I have installed two sets of MSA headers recently and both used the spacers as they call them.
What brand header are you using.


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haven't purchased a set of headers yet.

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Some links:

http://www.thezstore.com/page/TZS/PROD/classic19o/15-8083

http://www.zcarsource.com/exhaust-manifold-parts-240z-260z-280z-280zx-300zx_8_77826.html

http://datsunspirit.com/shop/intake-exhaust-studs/

https://zcardepot.com/engine/exhaust/exhaust-manifold-stainless-steel-stud-kit-240z-280z.html

Some people prefer stainless steel, Some people like the copper nuts, Other people just like the regular OEM parts.   Point is, They all work

I personally got my exhaust studs from Datsun Spirt and have not had any problems with them.

Good Luck.

Edited December 9, 20169 yr by gwri8

Just a tip. If you have the cast iron maifold and is off the car, lay a good straight edge across the face.

Mine was very warped. Took it to machine shop to have cut straight.

Not only will it seal better when put back on car but will relieve stresses on the studs tighting back to spec.

Edited December 10, 20169 yr by Lumens
typo

good idea. I'll try that

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And always use copper grease when you put those steel studs into a aluminum head, so they don't get stuck in there forever..

Just a tip. If you have the cast iron maifold and is off the car, lay a good straight edge across the face.
Mine was very warped. Took it to machine shop to have cut straight.
Not only will it seal better when put back on car but will relieve stresses on the studs tighting back to spec.

I checked my with a metal ruler, and no irregularities

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