They have primary and seconday injectors.

 

typex: what ems are u using?

 

Not sure what you mean by "ems" but I just got two injectors from two different cars (both rx-7s aren't the boxy looking ones, they're the rounder ones). They install just like the dsm injectors just that they are a bit taller. My injectors are red top not sure what the code is on the side though, I'll have to take a look again.

 

I did a write up on those injectors a few years back.
https://www.homemadeturbo.com/forum/...?topic=14648.0

I used the 460's and they worked fine when I had them.

 

The TT injectors are quite big also if you can find a set and you'd probably never have to upgrade ever unless your pushing some built high hp ----.