Originally Posted by Urufu_Shinjiro
I just cut mine off below the little bulge and heated my tubing in hot water and slipped it right on the fitting, no clamps needed or anything.
with one of them expanded at the end, it depends on who manufactured them. I think all OEM cores were 3/4 full length, not real easy to get 1/2 tubing over. Take a look at this picture you can see what I mean. They are both 77 bonnie cores but one is an OEM remanufacture and the other is an aftermarket. If you are lucky when you order it you get the after market. then the expanded end of the one tube can be cut off and you now have two 5/8 tubes.