Diagram:
![Image](http://bsod2600.home.comcast.net/~bsod2600/subaru/440/440cc_orings.jpg)
I started out and removed the left fuel rail. Wow, those fuel rails are a major PITA! Save yourself the hassle and don't remove them! My injector seals (under the fuel rail) were still nice and soft. To remove the injectors, sprayed some WD-40 on the top lip. Let it soak for a few minutes. Next, take pliers and turn the injector side to side some, so move around the WD-40 for lubrication. Then as you continue to turn back and forth, pull up and it should pop out.
Side by side of the stock and 440cc injector:
![Image](http://bsod2600.home.comcast.net/~bsod2600/subaru/440/injector_sidebyside.jpg)
It appears the fuel injector seal rings have changed over time. Hard to see in the pic, but the stock has a lip/ridge inside while the new one does not.
![Image](http://bsod2600.home.comcast.net/~bsod2600/subaru/440/injector_seal_compare.jpg)
It changes how it sits on the bottom of the rail. Once again, hard to see.
Old
![Image](http://bsod2600.home.comcast.net/~bsod2600/subaru/440/injector_seal_old.jpg)
New
![Image](http://bsod2600.home.comcast.net/~bsod2600/subaru/440/injector_seal_new.jpg)
After getting the left rail installed, it seems the gap between the rail and engine is abnormally large. Something to worry about?
![Image](http://bsod2600.home.comcast.net/~bsod2600/subaru/440/gap.jpg)
Anyways, got everything back together and took it for a 5 min drive. While I understand the ECU is still learning, it's got a lot to catch up! Cruising on the streets it fluctuates from 12-16 AFT. At 3/4 WOT the AFR drops down to ~9.5 -- very rich. When idling for a bit, it gets super lean; around 28-32 AFR. Isn't that too lean and can damage things? I'll be taking it for a 150mi drive this weekend. Hopefully after that, the ECU will have adapted.