Click to view attachment I am replacing the injector rubber washers and the kit smaller rubber o rings seem to be much thicker.

Any problem here or should i continue to use the old ones.?

Thanks

Old ones will leak.
Use the new ones. Looks to me from the pic that the old one is much thinner than it should be and the new one looks right.
If the injector doesn't with the new one, you can trim it a bit but again, it looks fine to me.

Looks like a totally different width..