K20A/DC5 Fuel Rail Guide


Warning: Not all after market fuel rails match up with after market fuel injectors. Please do you home work before attempting any modifications to your car. Also, many after market fuel components require a re-tune much like this fuel rail.

Locate these tabs and pull up on the fuel injector wiring harness to remove it.



With the harness out of the way, located these two nuts(circled in red) and remove them.

Find the four ports (circled in blue) and un-clip the plugs connecting the fuel injectors to the fuel injector wiring harness. There are little metal clips that you have to push in before pulling out the plugs, be careful.

Warning: a small amount of fuel may disperse from the depressurizing of removing the plugs from the injectors.


Pull up on the fuel rail gently and it should pop out with the fuel injectors.

Once again some fuel may discharge from the injectors, have a small cup ready. I cut a Starbucks cup in half that I was just drinking out of to catch the fuel as it came out.

Make sure to inspect the ends to ensure the o-ring remained attached when you pulled them out. You can tell that one of mine decided to stay in the intake manifold. I just used a pair of tweezers to pull it out and re-attach it to the injector.


This is what your fuel injector port should look like when you remove your fuel injectors.


This is what it should not look like.


Pinch down on the green clamps and pull your fuel rail gently away from the black fuel dispenser line.


A lot of fuel will be in your fuel rail so have a larger cup ready for draining.


Remove Injectors from the stock fuel rail and...


.....plug them right into your new fuel rail. It's that simple ^_^

Note: Make sure that none of the upper O-rings got left behind in the stock fuel rail..


Find the gap in the green clip and pop it off the stock fuel rail.


Then, install it on the new one. Another simple step!


Back track beginning at Step 5 and on through Step 1.

I manage to pin the wiring harness in between the fuel rail and some prongs that stick up on the intake manifold.

Then I ran all my wires underneath the new fuel rail. Not so bad for a noob job. If I did this, then so can you!