That's odd, i thought they really are a direct replacement, if you look at the exploded views from Traxxas, you'll see that the partnumber ending with an X fits too (which is the aluminum part)
Thanks guys for the help. This is another NOOB mistake on my part. I didnt realize there was three different sizes. This is my first time taking apart the bulkheads and I didnt realize. I put the other short ones in and they work perfectly.
Sorry for the stupid questions, but I'm learning as I go.