With very few out there, I was hoping anyone with one could post a picture of how you went about it. Or if anyone knows of one for sale.
From what I understand, 36" from engine to header is how long it should be, and I want to use 2 inch diameter pipe.
I have these 3d printed pieces I can mock something up from but I want to make sure I'm doing it right. for collector length, and what not.

 

that will also depend some on the intended chassis (not stated)

otherwise you can contact Logan at Defined Autoworks

https://www.rx7club.com/1st-generati.../#post10389593


if you can afford it, 18 Ga. T321 would be preferred over 16 Ga. T304
.

 

Logan quoted me $3200-4500....I spent that much on the motor I can't justify a header that costs that much...

 

I bougtt two SS headers on Ebay from a 13B and a 3 into 1 merge collector. I used a 20B exhaust header flange as a fixture. Cut off the 2 into 1 collector off one 13b header, and used one pipe and a length of straight pipe from the other to accomplish the third rotor section.

now if I had not been scammed on the 20B I thought I had coming, i'd be all set

 

Damn that sucks. looks like a pretty basic design. Were all the pipes equal length?

 

There wasn't any effort put into equalizing the length. The additional length from the collector to the flange had to be longer for the front rotor.
simplicity was the objective. I'm not looking to max out HP.

Not like it matters without an engine to mount it on!