Can't find a thread [searched]
 

The thread was by one of the regs IIRC regarding custom dual manifold mounted EGT's (AFRs?) through a purpose made bread board.

a comment was made that they sold an old egt system (for shipping $$) because the response was too slow.

Thanks!

I bet this the one you're looking for:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/dual-digital-egts-612960/
RX-7 Owners Club - dual digital EGTs

Good lookin' out. thanks