So I bought several pro kits from auto stores and none of them had the correct fittings so I figured I'd try harbor freight. They got two sets, one is a master set and the other is a cheap $20 set. I can't believe that that cheap set has like three fittings BUT magically the small one fits our car.

You will need to buy some teflon tape too. It's like 39 cents there. Then wrap the threads on the gauge part only or it will leak out there. Then just undo the small bolt on the bolt at the top of the end of the fuel rail, not the very very end, the bolt at the top. It's a 12mm bolt. Take the small crush washer and add that to the small fitting of the kit. You will see...it's the same size as the small bolt. Just take that stupid o-ring thing off and throw it in the garbage. Then just tighten it all up. Very easy. You can use vice grips to "gently" tighten the gauge kit to the rail. You don't need to put that thing too tight. Before starting the car, just turn the car to the "on" position and check for leaks.

There you have it.