TheSamba.com Forums   Forum Index -> Bay Window Bus -> Piston stamp numbers   View original topic: Piston stamp numbers 1975 Kombi Wed Feb 10, 2010 6:12 am What does the SP0.03 number mean on the top of a piston and does it make a difference if I have 3 SP0.03 and 1 SP0.02 in my engine. Powered by phpBB © 2001, 2005 phpBB Group