Post by
float_6969 »
https://forums.nicoclub.com/float-6969-u780.html
Thu Sep 16, 2004 4:55 am
Nevermind, I called him and found out the difference. The U/C ones have a smaller diamter and have less expansion. He said that people that build drag cars use the undercut ones. He said if you're looking for a lot (350hp+) of power to go with the undercut ones, otherwise, the regular ones would be fine.