Jim94-348 posted a DIY on adding a speedometer correction chip in this forum http://www.ferrarichat.com/forum/showthread.php?t=303123&page=2 I have just added that chip to my 308 and posted the DIY info in the technical forum. http://www.ferrarichat.com/forum/showthread.php?t=329231 Just a FYI bump for Jim...no need to reply