I noticed that the 92-94 rails I got for my EJ22T wont fit the EJ20G manifold, and I was checking to see if the injectors fit, and they would, except for the cap that holds them in place, it wouldnt seat properly. On a whim, I lined up the cap from the 92-94 NA rails, and it fits perfectly.
So while I havent tested it in action yet, it looks like you can put the STI yellowtops in the EJ20G rails as long as you use the caps from the 92-94 EJ22E.
Weird, but thats subaru for you.
![Image](http://i19.photobucket.com/albums/b165/92LegacySS/Fuel/rail_compare1.jpg)
![Image](http://i19.photobucket.com/albums/b165/92LegacySS/Fuel/rail_compare2.jpg)