i have a quick question about theses, when putting them in do i need to keep those plastics peices that are in the middle iron, in the injector seats? im not sure what they are called they look like they break up the fuel spray.

the mixing plates are what i'm refering to

If you are using the stock fuel rail you should have no problem leaving the mixing plates in.

What's actually needed to make the 850's fit into the stock primary rail?



Amel

there are two ways to go about it, one way it to take the rail down to a machine shop and have them shave about an 1/8 of an inch off the top, and the other way is to go to the hardware store and find an o-ring that will fit around the bottom of the injector, you basically want to push the large o-ring down so it seats better in the bottom of the rail