What do you mean by a different shape?? I have seen from PES 3/8 up to 5/8 3/4 tall. I just finished with the ones i was making at 5/8s fits nice even into a stock port(non ported head)}[oooooo]
I made them out of 6061 Alum.



------------------
NovaMan/Twisted6/Larry

Larry/Twisted6
[oooooo] smile
Adding CFM adds boost smile
shocked God doesn't like ugly.